Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a5c2088c151505c…

MALICIOUS

PDF

38.7 KB Created: 2020-08-22 12:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 759126dc0daa4d4ce87fa22b014f24f0 SHA-1: 0089f56216b9862715696cf460f2d96c53aa6db8 SHA-256: 0a5c2088c151505cc2148e3476ce11603f42ac4a5c2dc5f8f45942fabf78d845
194 Risk Score

Malware Insights

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

The PDF document contains a link farm and a malicious redirector URL, indicating an attempt to lead users to potentially harmful content. The document body, though obfuscated, contains the primary malicious URL, suggesting a phishing or scam lure. The presence of numerous links to external PDFs, many hosted on Shopify, points towards an SEO poisoning or link farm tactic to distribute the malicious redirect.

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.ru/pify?keyword=phonics+worksheets+for+kindergarten+vowels In PDF document text
    • http://jokufesis.iwfmasters.org/uploads/1/3/2/8/132815176/3183290.pdfIn PDF document text
    • http://files.larte.us/uploads/1/3/1/3/131398097/wetedifot.pdfIn PDF document text
    • http://joluko.healthandlibertysolutions.com/uploads/1/3/1/4/131482976/wemasatebuj_kuziruxe.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/1/0432/9832/4638/files/guacamelee_super_trophy_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/72850241452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9594/0519/files/jexudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/0901/0852/files/fofaxefizijizem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6444/2521/files/back_out_synonym_formal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9501/4042/files/jigakoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8212/0357/files/fozibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0740/9308/files/dwarf_fortress_armor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5426/0643/files/52695832746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/tepiniwepobetuj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E31 3144 bytes
SHA-256: b7e81078ca1921b06bc7b57a8682ea0fc8d8ab2df7f8ec833f8df47aae0587ac
font_01_sfnt_off00005954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5954 5500 bytes
SHA-256: 7d87d994d4ac13c14dc2e2306f2b195413f2f82908c288e7b320e091c0d45681
font_02_sfnt_off00006c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C10 9792 bytes
SHA-256: a60ad8fc8f39e6a380f088eeb70dfa3c4e0bfc649348cc0a909aff87330f1fba

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