Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a7e91e37c13560b…

MALICIOUS

PDF

44.2 KB Created: 2020-08-24 22:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 22b70968547c1a84db4b33c74db8820b SHA-1: 173e6352ab7d8225114287971ec4449e439e694a SHA-256: 8a7e91e37c13560bd98f345631594d6df3e4c0012c0c78f69d48b2490cfc0bfb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though partially corrupted, contains the URL 'https://ttraff.ru/pify?keyword=classification+of+phylum+annelida+pdf', which is flagged as a malicious redirector. This suggests the document is designed to lead users to malicious sites, likely for phishing or malware distribution.

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=classification+of+phylum+annelida+pdf In PDF document text
    • http://ximines.learningexchanges.org/uploads/1/3/0/7/130775565/9604509.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/1/0433/7090/5756/files/latekaripevuwakawoxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/80997960519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2030/3011/files/pozosobu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7058/6016/files/best_chord_recognition_app_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6575/2217/files/mathe_lineare_gleichungen_aufgaben.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9869/3013/files/punjabi_movies_sites_list_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1177/6416/files/16876974159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9074/5246/files/37327437163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2335/1458/files/how_to_install_an_apk_on_bluestacks.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 8

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_off00007164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7164 5304 bytes
SHA-256: 599ffd6e94c1066d6e4299dccf4cba8b4cf32dac738f14a6f7eb51574b052e67
font_01_sfnt_off0000834c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x834C 9672 bytes
SHA-256: 5c04a9664c4bb678b664c4803e0d34b0f14db88daa19dddf7b7a7f24089baa88

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