Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc6ab0621144e218…

MALICIOUS

PDF

96.6 KB Created: 2020-09-15 23:21:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e7f09bc26082ebb03344839b53747193 SHA-1: 6aa3e7c8f0fb49864a363657d2e67a87cf4bef73 SHA-256: fc6ab0621144e2185699013a9aafa5e62297c736ec33b6a1456eb23c8cce6ab7
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the same URL and a title related to skin terminology, suggesting a lure. The presence of a large number of external PDF links, many pointing to static.usrfiles.com, indicates a link farm strategy, likely for SEO poisoning to increase visibility of the malicious 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.ru/wb?keyword=clue%20term%20meaning%20pertaining%20to%20the%20skin In PDF document text
    • http://xurikaruz.notanothersupermum.com/uploads/1/3/2/3/132303382/robolatedizu-bigipajizud-bawubijibirapon-fufosonovorop.pdfIn PDF document text
    • http://kulal.starrygardenschool.com/uploads/1/3/1/1/131164497/8351413.pdfIn PDF document text
    • http://files.friendsofaptoslibrary.org/uploads/1/3/1/3/131383924/9a03211.pdfIn PDF document text
    • http://files.ponyselectbaseball.org/uploads/1/3/1/4/131452804/3515750.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b7ab08_42b5f29185e040548b9a4821e9b5aa17.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5dc3ca_ef73099e6c3d4b06992087d2717a8ab9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/85d67f_daf49a0c3dfc407bb1b532ff69a7199a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/162fe6_11b8d36193164b159e4ece80714dd5e3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cc14e4_935ddee0175042de8da53e59c03d80f5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2274a7_3c58ff3507ed4282810dbffc7322ebf0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1c8c6c_a9bbe665c4bd4130a45b1c0b7b6f9f51.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8cbfce_78560c2fc0f8415bb329b124669e15d7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1c8c1e_56fabb77095448a3adbf4d231743f784.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6cf392_66b8893f4cd142b69be598c3e24b3155.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 7

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_off00012317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12317 5204 bytes
SHA-256: 6f5b2400a556108f3320c09b6acb311cc578545807448f6fcde63f6febdb4399
font_01_sfnt_off00013490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13490 26288 bytes
SHA-256: 7ef3cf7ee083b3f437aa12ab2ee37aaeb6638ae4d5f88b8d75928df333646da1

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