Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5736eed504737c9…

MALICIOUS

PDF

46.0 KB Created: 2020-08-19 18:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 42ef73df7085c8e01d041cfe38f66ab5 SHA-1: 3102e91d570707421330da1dba3967c39b2fef1e SHA-256: a5736eed504737c9dcd8d1d968820ae56a2cd16c69e153ed6c1f19a8fc65f02e
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used to create link farms for SEO manipulation or to distribute malicious content. One of the primary URLs, 'https://ttraff.ru/pify?keyword=english+to+arabic+translation+pdf+free', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in directing users to potentially harmful sites.

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=english+to+arabic+translation+pdf+free In PDF document text
    • http://files.andreamkarkowski.com/uploads/1/3/0/8/130813108/mozovabobuxokusuni.pdfIn PDF document text
    • http://tafupe.detroitorff.org/uploads/1/3/0/7/130775288/jiverizarafoga_tizezaxupab_fuwejavefir_papezew.pdfIn PDF document text
    • http://files.yosukehashidate.com/uploads/1/3/1/8/131871730/452092.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/1/0429/8843/7655/files/good_morning_in_italian_informal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3547/5624/files/52781505240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/29470588114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3840/7832/files/39986244009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5883/7142/files/chithi_na_koi_sandesh_sad_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1428/1625/files/seniwonibelutim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2299/2028/files/ayuno_intermitente_y_dieta_cetogenica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8298/7173/files/15421125602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/dotodulaguvajusur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3933/2251/files/gonobajigiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6565/4939/files/62008626611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4233/3087/files/rig_veda_in_bangla.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/can_bus_basics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8083/5482/files/gidipavilu.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 3

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_off0000750f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x750F 5512 bytes
SHA-256: d93c5129e4663f94cfb6c4e7f86479df233e1dad7d6263085e20c79668514e81
font_01_sfnt_off000087b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B9 10192 bytes
SHA-256: 956d928528e112d46d52084dc2ec9874af577305889ff5d097c5e638e94909de

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