Malicious PDF — malware analysis report

Static analysis result for SHA-256 168041f074400912…

MALICIOUS

PDF

44.8 KB Created: 2020-08-23 17:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 444e9a9fe2180e8a3940e225e91b8e53 SHA-1: 99944535534e4b741814ebca0e77de6eff95c9fb SHA-256: 168041f074400912acfd37190c73a36cbbe217a8a6b55727c6682ace3f6487dc
194 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a redirector service, which is flagged as malicious. The document body, though heavily obfuscated, contains text suggesting it is a worksheet, likely a lure to encourage clicks. The presence of numerous PDF links, many pointing to Shopify, suggests a link farm intended to distribute malicious content or phish for information.

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/pify?keyword=area+of+trapezium+and+polygon+worksheet In PDF document text
    • http://bapovom.vscl.org/uploads/1/3/1/3/131380005/ca9330c986.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/1/0437/8450/3453/files/loi_binomiale_exercice_corrig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2852/8799/files/vuzisenavefexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8197/3416/files/rifepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepudanunakadop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/nidasiwalagavijidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/6814/9151/files/xititujavarewubug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/sanamalipeti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9861/9557/files/vuwizasonopemafiverovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/julanefiwozuxam.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off00005c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C6C 5752 bytes
SHA-256: f0f4af445f24fb37df73f45125d6cd0d060e8c526316d284e9f18c5ae283f28c
font_01_sfnt_off00006ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF2 9736 bytes
SHA-256: 856f88a075c37841595a79fff67b0e95db6d495db8df7ffcdd6889ec8d8a1257
font_02_sfnt_off0000916f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x916F 16088 bytes
SHA-256: 51b8d4c4f17389d80b23040d591c0dccb099bca9103ea84f58116e310badbe13

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