Malicious PDF — malware analysis report

Static analysis result for SHA-256 a83a0557239b7249…

MALICIOUS

PDF

110.9 KB Created: 2020-08-05 01:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 43e6736af05743ee4b81ed3689f27290 SHA-1: e4a8f0cd9b8d2f1c030ce4ef5d2441990299dea3 SHA-256: a83a0557239b7249ec3910656ea892d1d8d0745b919d6b753a6ffa47ffadce6e
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=lisbon+portugal+map+pdf, which is the primary indicator of malicious intent. The PDF also contains a PDF_SEO_LINK_FARM heuristic, suggesting it's part of a larger campaign to generate traffic through numerous links.

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=lisbon+portugal+map+pdf In PDF document text
    • http://files.blacksheepstrong.com/uploads/1/3/1/4/131409244/nifeduvovo-vozejunez-fonafewosegep-ninotudet.pdfIn PDF document text
    • http://files.thesoulfulbirth.com/uploads/1/3/0/8/130874284/8380944.pdfIn PDF document text
    • http://files.biancaking.ch/uploads/1/3/0/7/130740112/rapeke.pdfIn PDF document text
    • http://files.ppitowing.net/uploads/1/3/2/6/132695707/vixikuzokitejude.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/1/0434/8208/7576/files/fafigusoribijepom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78299439052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4031/7350/files/complicaciones_de_la_amebiasis_intestinal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/quant_job_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0669/7367/files/ligorolesosawigijufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/15205980322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2969/0525/files/pioneer_vsx_820_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2271/9912/files/megaman_zx_rom_hack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/97772580961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/83152897540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7546/9473/files/ratipuzujonozezijuzev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4523/1509/files/faxewakogafogimexuze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/depuwi.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_off00016c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C55 5444 bytes
SHA-256: 544493bc913e42827091f7a6020a29783a29078a91e8df842879074948a44203
font_01_sfnt_off00017ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EBE 15152 bytes
SHA-256: bdd592b740638f9852f3e5dbf180eec4618035284d13ef7d5a752cca6dc68c48

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