Malicious PDF — malware analysis report

Static analysis result for SHA-256 7438c1776f4d6c78…

MALICIOUS

PDF

48.0 KB Created: 2020-08-15 06:17:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 500a81b5aa800caedfcafd8f83a54bd1 SHA-1: 7c4b092f04e38f15ad3b62e3d898d57fea557e5d SHA-256: 7438c1776f4d6c78a2485f502ccb38628431dbc7ad575950ec797aad2d1f69ed
194 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though partially obfuscated, suggests a lure related to 'report sheet answers', aiming to trick users into clicking the malicious link. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination.

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.com/pify?keyword=measurement+and+significant+figures+report+sheet+answers In PDF document text
    • http://pobukizas.leeengineeringinc.com/uploads/1/3/2/7/132740541/6649653.pdfIn PDF document text
    • http://files.4arrowsoutdoors.com/uploads/1/3/0/8/130814672/1910526.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7153/7301/files/81175434915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1087/2728/files/dofenowotawatubalesapem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/86512566452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7620/6238/files/89418131157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5884/6109/files/7290600986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8995/2922/files/79304811535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6713/0534/files/netepokixetoxafakojok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/75540756173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0192/0157/files/62669803735.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2E 5516 bytes
SHA-256: 81ff094dd56e365c2859fd80f5c83ab2e5666cc407b966c3a3ceff1063013e51
font_01_sfnt_off000081d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D1 10276 bytes
SHA-256: 0b202ad302f78f43667d7035c6754fac00e965376c96481d45310f7b3eea3f66
font_02_sfnt_off0000a4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4F2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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