Malicious PDF — malware analysis report

Static analysis result for SHA-256 da2529a3d28bec23…

MALICIOUS

PDF

37.7 KB Created: 2020-08-25 16:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2f84cf9081056b4af0b12758468bfc89 SHA-1: 5078cf0ea27b4c9ffa13432a6dd879f2b2e29923 SHA-256: da2529a3d28bec2373e1e89233a78d51bb97a0e36c791842ebd9112d42864329
162 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 pointing to Shopify domains, but one critical link redirects to a known malicious domain. The document body, though heavily obfuscated, contains text related to 'Instagram app latest version 2018' and the malicious redirector URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly supports the malicious verdict.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=instagram+app++latest+version+2018 In PDF document text
    • http://files.treehouse-creative.com/uploads/1/3/0/7/130739366/1454625.pdfIn PDF document text
    • http://bakalatof.unitashonor.org/uploads/1/3/0/8/130814328/8183600.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/1/0436/6984/8217/files/35226505023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4819/6506/files/33956363048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5682/3462/files/fogakaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3751/6191/files/sociology_notes_class_12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8266/2553/files/73414432035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/digikawilukukomepuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/zodenamupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3740/6870/files/folubepezanubitikuriga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/aisi_koi_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3779/4204/files/49050739773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0703/1966/files/another_irish_drinking_song_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/davunaxejapezuxipuwuwozom.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 3

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_off000054ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54AB 5656 bytes
SHA-256: 2c541024797f536f1599db9fce79f630dbf6d19d6085c2ce39537c1e50069017
font_01_sfnt_off000067dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67DD 10176 bytes
SHA-256: 1df1a4e6202b50089b083769d69f8351d5576c4c0b970ed42b125df075ae25dc

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