Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a914ac6725c6537…

MALICIOUS

PDF

35.9 KB Created: 2020-08-22 07:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 71270104985c750553427e4b5859cc44 SHA-1: 4c1183fc2afc15cce7c40e0528564eeb72d3b067 SHA-256: 5a914ac6725c653702ae840b66c5bd7c6172e9f5f718b3612f7d3c5c5a0871de
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 URL, which is flagged as malicious. The document body, though heavily obfuscated, includes the same redirector URL and benign-looking PDF links hosted on Shopify, suggesting a link farm or redirection tactic. The ML classifier also strongly indicated maliciousness.

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=raja+babu+bhojpuri+song+ringtone In PDF document text
    • http://files.completetaxservices1.com/uploads/1/3/0/8/130814858/wefin.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/1/0431/4624/8358/files/36394232443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/10330724951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0120/0288/files/lemonlike_fruit_crossword_answer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0066/8065/files/icloud_drive_android_whatsapp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/68686421952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2216/3866/files/40506852405.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8231/7991/files/snakes_cool_math.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6069/6990/files/50225896502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9050/9973/files/43043718411.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 1

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_off00004f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F38 5272 bytes
SHA-256: a5a89eb56800a190b515d4d3f7b4766598dd02d98f43da30657ffa1c6ed456bd
font_01_sfnt_off00006124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6124 9980 bytes
SHA-256: fcf3c8102414d8ce4a3ea55fcac79c1ddf9aa924a7ee75c95ac890098676dede

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