Malicious PDF — malware analysis report

Static analysis result for SHA-256 916387d1b1afbedc…

MALICIOUS

PDF

40.8 KB Created: 2020-08-03 15:55:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ec2a1a92da9c6f7b7285462d9bbdd0ca SHA-1: 9df8a31af890fd54f85dc433e5e4afdbaca3a1b9 SHA-256: 916387d1b1afbedc49ebef9143bdd34c7c0cf4f8ea0600846b85eeb1b57fdc73
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, https://ttraff.cc/wb?keyword=past%20simple%20and%20present%20perfect%20passive%20exercises%20pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.cc/wb?keyword=past%20simple%20and%20present%20perfect%20passive%20exercises%20pdf In PDF document text
    • http://files.granitecommunitychurch.com/uploads/1/3/1/8/131857540/5859092.pdfIn PDF document text
    • http://files.gradgov.com/uploads/1/3/1/3/131398351/7681797.pdfIn PDF document text
    • http://files.thegreatmoosemigration.com/uploads/1/3/0/7/130740193/3970290.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/1/0429/1058/0903/files/gugefunijujepogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7555/9829/files/78525742759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2418/7549/files/jifijadadogurir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3367/4396/files/nizilakekituxararopowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3337/0522/files/pamaserudug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/77671913734.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4695/1319/files/javafx_disable_button.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5856/9115/files/kajafega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6900/4190/files/86365561510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4642/8072/files/jedi_mind_trick_gif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/41716008663.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/tapewanavajurowi.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 6

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_off00006143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6143 5428 bytes
SHA-256: a838e09e00f1120cb99a9374e40ff875f4c1a426609c149f919f669a1f1d4182
font_01_sfnt_off000073ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73AD 10060 bytes
SHA-256: ba9f424c363063b8a3248e58283186cb5e9f594518eadf625a5870b0f148eddf

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