Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b1c80eb996f7c19…

MALICIOUS

PDF

41.6 KB Created: 2020-08-11 14:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: da959994ec0dfb7b07db966264bf61f2 SHA-1: c3293d0e8d174f057b4b4bd79b5998297fc43023 SHA-256: 5b1c80eb996f7c19566e80d3c025c0359ea43c4901504192a954693601ca5bca
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service at 'ttraff.ru', suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the same lure text and URLs found in the heuristics. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect users to malicious content or phishing pages.

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=coc+certificate+of+conformity+pdf In PDF document text
    • http://files.paperchasewholesale.com/uploads/1/3/2/7/132741029/wuwufexu.pdfIn PDF document text
    • http://files.themobilityfactory.eu/uploads/1/3/1/4/131437676/rabubixi_lamazi.pdfIn PDF document text
    • http://files.proficiencyfirst.com/uploads/1/3/1/3/131383544/047093.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/1/0440/7944/8216/files/kerowebokona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/nox_insufficient_disk_space.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/also_sprach_zarathustra_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/21444694434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2777/4115/files/45730992965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6173/1743/files/ashraful_hidaya_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3274/6906/files/attention_guitar_tabs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5604/7004/files/67405647345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7935/1976/files/52215373030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4624/7332/files/vozadiromejebefaxizujudeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4152/0805/files/befusomapirupamizar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/futigizoxotatamirigopoj.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_off000065e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E4 5096 bytes
SHA-256: a5cde73573151d35701b718bd339c8602b036e35797705d5452fe44934dce1fc
font_01_sfnt_off0000771a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x771A 9960 bytes
SHA-256: 62995aebef483f6be1cc88b7e1a24d0294261d8dbebcf4733cf4af34ab0b84c9

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