Malicious PDF — malware analysis report

Static analysis result for SHA-256 83732a50be9cf78e…

MALICIOUS

PDF

46.6 KB Created: 2020-08-24 05:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7b981dcf5bef954d95c4d0f768caadbd SHA-1: 73972d4dff895ececec3be87e210b72eacefe5fa SHA-256: 83732a50be9cf78e4b5da2c9b13785f47ea641e3ec2a5b95e6add2aa2d00dc0b
194 Risk Score

Malware Insights

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

This PDF file contains numerous links pointing to redirector infrastructure, specifically identified as a malicious redirector at 'https://ttraff.com/pify?keyword=calisthenics+app+android'. The document body, though heavily obfuscated, also contains this URL and a large number of links to PDF files hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this as malicious, supporting the conclusion that the file is designed to redirect users to harmful sites.

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=calisthenics+app+android In PDF document text
    • http://zofowav.lindsborgadhocroundtable.com/uploads/1/3/1/4/131438324/5689251.pdfIn PDF document text
    • http://files.nimatennis.com.au/uploads/1/3/1/6/131606965/4116325.pdfIn PDF document text
    • http://files.learnguitar4fun.com/uploads/1/3/1/8/131856381/8522082.pdfIn PDF document text
    • http://files.tony-medina.com/uploads/1/3/0/7/130776123/defagexeve-sifibur-roxojixawo.pdfIn PDF document text
    • http://files.argumentationtoolkit.org/uploads/1/3/0/7/130739396/xoruboj-xutodin.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/1/0432/0041/3856/files/vutorudifadeguzugux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/curriculum_vitae_online_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3786/5637/files/76637846847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/53655279192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3480/4375/files/74223918954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1400/2600/files/98567955441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/gakisuzegalonaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6112/5015/files/lalanorujavabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/xipedutozilukanepisop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0926/1217/files/theory_of_metal_forming_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/final_written_warning_template_acas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5064/7204/files/82192502900.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C88 4972 bytes
SHA-256: 3d71cc6f8b236be7903c67761b9c55c97244fb6a70a71f5d56e759a3154e874a
font_01_sfnt_off00007d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4D 9992 bytes
SHA-256: 76c71d6151f4775247015072c600e776729fb214e4f4ac1420195bb8547b07a2
font_02_sfnt_off00009f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F7D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34