Malicious PDF — malware analysis report

Static analysis result for SHA-256 42d960186240d2de…

MALICIOUS

PDF

43.6 KB Created: 2020-08-09 06:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b8be8a908cc4bbfdebd9f70571ad9604 SHA-1: 96af51c44188b99428ff96d2a4f6cf9cc834b2ba SHA-256: 42d960186240d2de7cc053b63d9b6dce6c2557657710d0987e12c30dcff3da08
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded links, many of which point to external PDF files. One URL, https://ttraff.ru/pify?keyword=biomath+paces+pdf, is identified as a known malicious redirector. The document body contains garbled text but includes the same redirector URL, suggesting a potential lure or redirection mechanism. The presence of numerous external links, including the malicious redirector, indicates a likely attempt to drive traffic to malicious infrastructure or manipulate search engine results.

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=biomath+paces+pdf In PDF document text
    • http://files.catherine-banner.com/uploads/1/3/1/4/131483009/suwuvugulogiwutiluxa.pdfIn PDF document text
    • http://files.parlinfarmcabins.com/uploads/1/3/1/6/131636683/d5da1e.pdfIn PDF document text
    • http://files.lengleart.com/uploads/1/3/2/7/132740260/fajerobu.pdfIn PDF document text
    • http://files.hallandhines.com/uploads/1/3/0/9/130969935/donunukodivan.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/1/0430/8012/2532/files/26630857316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/census_report_2020_nepal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/adjectives_worksheets_for_first_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4103/0293/files/38186108869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5050/8181/files/past_tense_worksheets_grade_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/5144/5400/files/avantages_allaitement_maternel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5071/9642/files/github_upload_folder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7895/9775/files/tizopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5054/7870/files/mutomududuvategina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0027/2792/files/xederokisiriwame.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 3

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_off00006b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B92 5316 bytes
SHA-256: 7ce36dc728eaae96de499449f8824ccc27409eadb23703071ff3677d765cac0f
font_01_sfnt_off00007d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D80 10696 bytes
SHA-256: 72019fa784e90a2349f1a6789765728459df0aeddd9d2a911f3293d75ade1712

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