Malicious PDF — malware analysis report

Static analysis result for SHA-256 527416a1dc75e2c6…

MALICIOUS

PDF

43.0 KB Created: 2020-08-06 02:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d4a92541d473edae6ed564b554f344b1 SHA-1: 0c3f0b9e742125318e132141a4811bd430e99f1b SHA-256: 527416a1dc75e2c66ef10030a0ca39d1536378172397bc9e4e75c1136221b450
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to a 'course manual'. The presence of a malicious redirector and the link farm heuristic indicate an attempt to lead the user to malicious content. The SE_CALLBACK_LURE heuristic further suggests a phishing or scam pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=advanced+life+support+course+manual+pdf In PDF document text
    • http://files.dylanness.com/uploads/1/3/0/9/130969819/860cb.pdfIn PDF document text
    • http://files.digitalpoet.net/uploads/1/3/1/4/131406036/derosaroratabibe.pdfIn PDF document text
    • http://nerolejej.creativityandthedivinefeminine.com/uploads/1/3/1/4/131437363/powid-sadijunigopefe.pdfIn PDF document text
    • http://files.miscoehillpto.org/uploads/1/3/2/7/132740239/nubipawesu-dafiroto-ranibipumu-susijebutofiwem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5798/5189/files/2_decimal_places_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/line_drawing_algorithms_in_computer_graphics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67279733654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/14618486478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0577/7832/files/53937451259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/soranezumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2775/7216/files/67400389995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7179/0486/files/acalasia_pediatria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5473/4235/files/1-_99_crafting_guide_rs3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/1324/5848/files/save_from_net.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6231/3631/files/ximimejiriramudevel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7471/4790/files/kindle_cloud_reader_chrome_extension.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8729/6680/files/occupational_health_and_safety_act_wall_chart.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A6 5352 bytes
SHA-256: a5fb06fdca1074a887e7b9571b21eb8f294eee89970a7b4fefed9566ea286af7
font_01_sfnt_off00007acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACC 10616 bytes
SHA-256: 6f7616fc6b9eca8bd331af1dcc1dc991faf25c2d8b3b52c0070c6ed21775e7a5

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