Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c9c76da93fcd6bd…

MALICIOUS

PDF

40.1 KB Created: 2020-09-16 19:31:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 242b8d32c8bb330276b882c904564134 SHA-1: 8fe346b3b68790c1f69a3216e1067981750dd569 SHA-256: 9c9c76da93fcd6bdf9a3c2d09a69de27913943d650983bfe0fdabc5dbf2213c7
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to known malicious redirectors or link farms designed to obscure the final destination. The document body, though heavily obfuscated, contains the text 'Computer hardware worksheet' and the malicious URL 'https://ttraff.ru/pify?keyword=computer+hardware+worksheet', suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

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=computer+hardware+worksheet In PDF document text
    • http://lofomo.returningtocompassion.org/uploads/1/3/0/7/130775934/tofufiduburat_kinulosepojep_visemak_dowed.pdfIn PDF document text
    • http://files.birminghamyouththeatre.co.uk/uploads/1/3/2/7/132710783/vuvazuzixife_bofedalonuf.pdfIn PDF document text
    • http://files.intuitons.org/uploads/1/3/1/3/131383247/rakexisakowam-lajirizaku-nodujeva-povebajuge.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/1/0433/5471/8358/files/begilegomox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/adobe_after_effects_cc_2015_v13.5_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7097/9238/files/52059502293.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7847/6195/files/mathematica_for_windows_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/17933622695.pdfIn PDF document text
    • https://02a54e7a-a94b-4242-905b-7f76efb5ee49.filesusr.com/ugd/834936_96f151df387e4308ac64dbff6e8a4741.pdf?index=trueIn PDF document text
    • https://fb5fa0fe-024e-46dc-ad9f-241d32ce8c4c.filesusr.com/ugd/18574e_de5912d3c7b64e898dca314c29855496.pdf?index=trueIn PDF document text
    • https://a9d3945f-d792-46ba-97bf-f1761a0cbd34.filesusr.com/ugd/95089d_96b524dd8fdc4e45b7d81ff47c527d61.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/black_scorpion_4sr.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/tikerobetepamokateren.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F11 5228 bytes
SHA-256: 809983f988ccdc97a35a216cbbe6ef6d567a382cb929fa5841b7cba37d5cf2e5
font_01_sfnt_off000070b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70B8 10256 bytes
SHA-256: 94cbcd348cb219027c14ce202f90e5c1f748206bcd5b99fb9883096832f7b6df

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