Malicious PDF — malware analysis report

Static analysis result for SHA-256 26c1b1895fd29249…

MALICIOUS

PDF

37.8 KB Created: 2020-08-23 16:07:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 75bf73052c9768be44fe0d84d8e8e491 SHA-1: fae2c8807ac71bc1a240aba399ea12c528e735e7 SHA-256: 26c1b1895fd29249fa1b0ff6b9d7708821698c3ce11fc05b888215386f360254
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.ru/pify?keyword=fraction+decimal+percent+conversion+table+worksheet'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs. The document body, though heavily corrupted, contains fragments of the URL and mentions educational topics, suggesting a lure to disguise the malicious intent. The primary attack pattern involves tricking the user into clicking the malicious link.

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=fraction+decimal+percent+conversion+table+worksheet In PDF document text
    • http://files.careholisticcenter.com/uploads/1/3/1/4/131437322/8528ef58199.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/1/0433/0687/7080/files/38655606666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7614883084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/4798/0951/files/zaromikizovigoruvax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2569/4883/files/zawesosogurupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7857/4490/files/sotomedivipewulesapegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/bank_clerk_exam_study_material_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/bifowetake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0665/5642/files/integration_of_hyperbolic_trigonometric_functions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/xusaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/7643028202.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000540c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x540C 5624 bytes
SHA-256: d9feacc69a91e85793ec80c41f28de9730f0a37464ee0645dfa3e9cd9321f90d
font_01_sfnt_off0000670b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x670B 10756 bytes
SHA-256: a61ed3672984710c7c702cf50357405a46b83bd4aad5a434fcfba5874547c048

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