Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff8e4870d79f4b65…

MALICIOUS

PDF

48.9 KB Created: 2020-08-15 15:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e3a43f7b75125651120457563b8b9c06 SHA-1: 06dbcfc27fe0ee2a25aefcc16813f6d1c6379c47 SHA-256: ff8e4870d79f4b655a480a06f713bcc0b8115ecf64907204494b1e2cfe3bc5f2
194 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous embedded URLs, including a critical malicious redirector at https://ttraff.cc/wb?keyword=composicion%20quimica%20del%20plasma%20sanguineo%20pdf. This indicates a likely attempt to direct users to malicious content or phishing pages. The ML classifier also strongly flagged this PDF as malicious.

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.cc/wb?keyword=composicion%20quimica%20del%20plasma%20sanguineo%20pdf In PDF document text
    • http://files.pecd.us/uploads/1/3/0/7/130775953/d603d3f231013.pdfIn PDF document text
    • http://files.gethsemaneprays.com/uploads/1/3/1/4/131454620/lasosepor.pdfIn PDF document text
    • http://gofisatog.eastafricanpartners.com/uploads/1/3/0/8/130874359/tixuge.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/1/0430/9064/1045/files/dikonubirufuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0754/1401/files/26983551051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9481/7435/files/60157469265.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0077/2254/files/case_580k_backhoe_operators_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2881/4741/files/cost_accounting_solution_manual_15th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/non_recommendation_for_promotion_counseling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6917/6985/files/busepovesenig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1392/2206/files/gonaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7216/7841/files/jozarusinifif.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_off00007d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D88 5408 bytes
SHA-256: 9f31c23c539ec32819ba52ef5efa3baab730f1612697506cefb79c8ab4358872
font_01_sfnt_off00008fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD7 11328 bytes
SHA-256: 09c2b61717650364302cb76f440ef571efc149d418f3e197d48566bf1ed54eb2

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