Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c8abfb8abbd890…

MALICIOUS

PDF

42.8 KB Created: 2020-08-03 12:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 83e36d46c328dcf423a4ed207c17720e SHA-1: a025b996cba60f872f7f24c5e2e122b4f8d580bf SHA-256: f1c8abfb8abbd89063ca0385ad5fb94e595f606258e30ace9bb265b6fcfc0f37
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=lung+cancer+pathology+pdf'. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites. No scripts were extracted from this sample.

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=lung+cancer+pathology+pdf In PDF document text
    • http://files.samuelclemens1856.com/uploads/1/3/2/6/132682936/faresukawufupijapu.pdfIn PDF document text
    • http://files.sassyandgrassy.com/uploads/1/3/2/7/132740439/sosatagexebima_muxabovugimeka_jarilupawa_nugifefok.pdfIn PDF document text
    • http://files.brettraio.com/uploads/1/3/0/7/130776594/79719.pdfIn PDF document text
    • http://files.lindberghfoundationstl.com/uploads/1/3/1/1/131164159/bowav.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/1/0428/9835/8432/files/58143530911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/sohna_master_plan_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/99888297674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/nibafopipedatukunobofaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4637/9426/files/30870072583.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/bupujazorifuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5676/6869/files/autodesk_maya_2017_basics_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/wabobogariwovujokomarunej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3334/6719/files/vomugileweba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9997/1999/files/61015929998.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6209/8085/files/88504781504.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 7

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_off0000694f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x694F 5284 bytes
SHA-256: e8f93014ae076be556ef973742088e2eabfd43dee97e81b7f68b2b0ab04b1395
font_01_sfnt_off00007b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B57 10304 bytes
SHA-256: 6cbb60057045e4995e49857bb782c5e3bebfaa50b3f8b730dba272afd8f77c55

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