Malicious PDF — malware analysis report

Static analysis result for SHA-256 83828775540ec2e6…

MALICIOUS

PDF

41.2 KB Created: 2020-08-23 15:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5ff364b77742f3526caf6d2a76dde7b4 SHA-1: 7863652ec43e995c74329f70e7bf74bf2fc96842 SHA-256: 83828775540ec2e6e4809dbbbb026bfa26bc21db0be7b2549feeb6ce374bb460
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Appleby college school uniform' and includes the malicious redirector URL. This suggests a phishing or scam attempt, likely using the embedded links to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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=appleby+college+school+uniform In PDF document text
    • http://files.melrosespeech.com/uploads/1/3/1/4/131411281/poxelakotivexasu.pdfIn PDF document text
    • http://sosuruzil.davidjonesdialogues.com/uploads/1/3/1/8/131871390/4e3cc770c.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/1/0437/8938/5879/files/string_format_to_hex_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4363/5879/files/88411030285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7182/3267/files/vifajadux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6942/3257/files/banjara_lambadi_dj_songs_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8652/0224/files/jipaxasovuziparo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977314479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6041/0021/files/heart_beating_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/tajitepalamevogiwunutal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3683/3952/files/windows_god_mode.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 4

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_off00006088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6088 5448 bytes
SHA-256: fc9ffa4cb8addef830bbbdcbbd879d855c9556fcac2bddcbbcca7c5ce84bce41
font_01_sfnt_off000072e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72E7 11528 bytes
SHA-256: 0211cdbbf1a7d0d376cf5f512f1c90defd7c1b100bdfc04560fc7cbeea26965a

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