Malicious PDF — malware analysis report

Static analysis result for SHA-256 b81079e5a7929237…

MALICIOUS

PDF

41.1 KB Created: 2020-09-12 15:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bf4b727bd864bbd99ad87d0a18cb53df SHA-1: 6d52915c62e3b682d775d970887770b6c943b3f6 SHA-256: b81079e5a792923767980dfb57715303890ab6523efda9c3bf4b6abf5b044fa8
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a redirector to 'ttraff.me' which is associated with malicious activity. The document body, though heavily obfuscated, contains text related to an 'Aggiornamento android 9 samsung' lure, suggesting a phishing attempt to trick users into clicking malicious links. The presence of a large number of external PDF links further indicates a link farm or redirection strategy.

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.me/pify?keyword=aggiornamento+android+9+samsung In PDF document text
    • http://wabomi.milkwelllactation.com/uploads/1/3/2/7/132712109/bfe07f125a45.pdfIn PDF document text
    • http://files.victoriaghairdesign.com/uploads/1/3/2/6/132695719/zogina-wumivijelerevub-rugowog.pdfIn PDF document text
    • http://files.saracatrin.co.uk/uploads/1/3/1/3/131380480/gufajaneso_zujumigenowu_liviti_dowezavo.pdfIn PDF document text
    • http://mepat.reelectjudgetabbey.com/uploads/1/3/0/9/130969300/tetot.pdfIn PDF document text
    • http://jukobur.sciencehillbaseball.com/uploads/1/3/0/8/130874429/ruvix_zovizuza_dimuxexitase_wovivi.pdfIn PDF document text
    • http://files.cutcopyandpaste.co.uk/uploads/1/3/2/6/132682676/a710d0cbe.pdfIn PDF document text
    • http://files.body4lifetraining.com/uploads/1/3/0/7/130738940/tibetuzugimol.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/a07927_f7d778ab192944a6bfecfbcfbbd95aa7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/359e64_9dafffa476524b5c8b81023ae97208c5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0dcf4b_ef9e3fb2ac3046698735ec73b81df527.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/39a0fd_62dbd8b048d742d88c559985f0d3cd9c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9f6a24_8b4320b995094b9ab92775b393e90c03.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/694d5d_e1f322b7213c4793a7b0fbedcb5a5f2b.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 8

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_off0000610a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x610A 5256 bytes
SHA-256: 223cb462f99b730de0693886835228f9571caec013724a1cb4d0ec8bf70038e8
font_01_sfnt_off000072d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D1 10784 bytes
SHA-256: cab0dcfcad58fac33e7639d63e1cad4049b40ac461b80d3736e4e92b0994f78a

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