Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb58aba1368461e…

MALICIOUS

PDF

40.6 KB Created: 2020-08-07 15:10:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b266555e1428de9d2b94b66e85d8073a SHA-1: bb7e6a9620360d6f3b5bdb81eea0a48554a5966f SHA-256: 9cb58aba1368461eadda7a34c854dff45e777816a3fd8d43d01173293aa3d02c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=flow+cytometry+guide+pdf', suggesting a lure to a malicious site. The presence of a link farm and a high ML classifier score further support malicious intent. 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=flow+cytometry+guide+pdf In PDF document text
    • http://files.livepeabody.com/uploads/1/3/1/4/131438234/jekife_duwabusene_xinuw_jevibipon.pdfIn PDF document text
    • http://files.hugheslandscaping.com/uploads/1/3/0/8/130813612/seketelab_xumanagas_gakazotija_zoziz.pdfIn PDF document text
    • http://zidoroweg.thevitalitycafe.com/uploads/1/3/1/4/131482853/45aa771.pdfIn PDF document text
    • http://files.bbbf-sizzlereads-bestbookboyfriends.com/uploads/1/3/0/7/130776875/7ffd6.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/1/0433/9898/7941/files/74005852541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0866/3457/files/74068122249.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4016/7320/files/mini_cooper_owner_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4536/2581/files/35391560980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2681/5903/files/36321965913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8130/9085/files/sutidufeviber.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3887/4532/files/precalculus_with_limits_a_graphing_approach_ron_larson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/97241754855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0741/8263/files/75402454739.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9301/7247/files/1502217715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2344/8736/files/dobodetinofibomatot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/83168043657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7378/1411/files/62445310716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/99268493276.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 6

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_off000061a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A7 5236 bytes
SHA-256: 6eb75b9fe78bf73bd93b11dce18de81c74b89130d7b5d8913e1273eda58ca975
font_01_sfnt_off00007380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7380 9932 bytes
SHA-256: 357dca3339e357500438837cd8e9ed42a63cdaaddd18c33d4c5877942127efee

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