Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bc9768f7b41d8c8…

MALICIOUS

PDF

58.6 KB Created: 2020-08-15 22:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 94c2592560ace6acd72278443942e410 SHA-1: cae78c14adb7aec7f481c119ad908b267527c624 SHA-256: 4bc9768f7b41d8c8f208f7250f580ea3e8e7f08649cbe9e1f879fd4542ca94cb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector at 'https://ttraff.com/pify?keyword=android+bitmap+set+scale'. This indicates a likely phishing or malware distribution attempt. The document body, though heavily obfuscated, also contains this URL, reinforcing its role as a lure. The presence of numerous links hosted on Shopify, while many are benign, suggests a tactic to obscure the malicious destination among seemingly legitimate content.

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.com/pify?keyword=android+bitmap+set+scale In PDF document text
    • http://vepenafa.marvlindbergmysteries.com/uploads/1/3/1/4/131437792/2a4df4e2b5.pdfIn PDF document text
    • http://files.nsp-sports.com/uploads/1/3/2/8/132814930/donov_nowinivib_diborix.pdfIn PDF document text
    • http://files.koahspeargun.com/uploads/1/3/1/6/131606631/zufipowada.pdfIn PDF document text
    • http://files.ohanaholistichealth.com/uploads/1/3/1/8/131871499/lalowonezukamor.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/1/0433/4449/4750/files/piloruj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7063/5678/files/webugekev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2308/1378/files/55799426801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6454/8762/files/wordpress_website_development_proposal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3228/9175/files/27856793171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3378/6530/files/minobifofigupod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5747/8823/files/le_rassemblement_dmocratique_africain.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/71731921262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/33007410973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3192/8740/files/19635903574.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 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000917c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x917C 3160 bytes
SHA-256: a671bc07a671bbdfe73b73cd030862e691fc5146d31e20104b6d94be80d36750
font_01_sfnt_off00009cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CD6 5348 bytes
SHA-256: 23eba9bfb15b666ab0441f35f66b893ac37448f457aecdf82914c7e1915f266b
font_02_sfnt_off0000aedb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEDB 14848 bytes
SHA-256: 8d5382bb2bfb467cbc0ba1abebcef62ffd7ccda6977910b035cbf7c0f5c29f09

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