Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b770c4261e3a0cc…

MALICIOUS

PDF

51.6 KB Created: 2020-08-10 00:20:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c29e31f0cf3e577c5b92296da426e7a0 SHA-1: 918272d80401131fcab2b886bf01aa1530fc1829 SHA-256: 1b770c4261e3a0cc0dc3009eb291d373261e36e8db89b11188b50549e3db32dc
194 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links. One critical heuristic identifies a link to a known malicious redirector, 'https://ttraff.ru/pify?keyword=bendix+brake+pads+catalogue+pdf', suggesting an attempt to lure users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The presence of many links, including those pointing to potentially compromised or malicious domains, indicates a probable phishing or redirection attack.

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=bendix+brake+pads+catalogue+pdf In PDF document text
    • http://files.usjapanfam.com/uploads/1/3/1/4/131453944/wubawu-dibuniri.pdfIn PDF document text
    • http://lorujib.wonderfuljourneytravel.com/uploads/1/3/0/7/130775607/d2d02dd76bd.pdfIn PDF document text
    • http://files.speaktruth1.com/uploads/1/3/1/3/131384025/suzeza_golekawixezoz_subikidu.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/1/0436/7073/2950/files/design_and_fabrication_of_candle_making_machine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8794/6143/files/vmware_player_vs_workstation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/65978174713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4275/7029/files/92915400469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6369/6805/files/sibuxulonimorofidelumigi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8865/7051/files/93325800307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/21_jump_street_full_movie_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/optical_isomerism_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9128/7461/files/cinetica_de_crecimiento_bacteriano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1281/6034/files/pharmacotherapy_casebook_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/adhyatma_ramayanam_kilippattu_malayalam_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/24426353605.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_off00007c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C32 5644 bytes
SHA-256: bd01043c35fe6a6c0b0dc06e5a455284f109df0e5b505bad33dc7cbfacff2929
font_01_sfnt_off00008f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F82 15904 bytes
SHA-256: d5d2513d2db8d67519609696352ea15910f57226ae45f30dc9d52f641844f95b

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