Malicious PDF — malware analysis report

Static analysis result for SHA-256 c957c5530537902b…

MALICIOUS

PDF

41.7 KB Created: 2020-08-02 16:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aead3997c152204fcbba6ee9a8e92a7c SHA-1: 50d65ada7dfe8ec5dac8aa33035f185e3fb52dd7 SHA-256: c957c5530537902b70e1cdc60ee262a5eec461097ad6819b7c271fdedbd99f4f
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded links, indicating a link farm. The ML classifier also assigned a high probability of maliciousness. The document body contains a URL that appears to be part of the link farm, suggesting the primary purpose is to lure users to external 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=what+is+the+relative+error+formula In PDF document text
    • http://files.andreanelson.studio/uploads/1/3/1/8/131871690/b02bc.pdfIn PDF document text
    • http://files.jockmuir.com/uploads/1/3/1/3/131398010/galituv-woxizefoxit-xininesagexup-senoloxinus.pdfIn PDF document text
    • http://files.abchase.co/uploads/1/3/1/4/131407080/topevekulolomela.pdfIn PDF document text
    • http://files.thegarbagefire.club/uploads/1/3/1/3/131398605/5487972.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/1/0434/6671/9385/files/furusewozomebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tapowizilefaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9540/9311/files/94884647836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9308/8661/files/church_usher_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8972/9438/files/vanoss_minecraft_skin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/28399847603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/xizagenijakuxajesarivelam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5247/3252/files/busogebaxapokosebasuboxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9898/1030/files/nifilubipuvivafumika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jeravutudab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2795/4840/files/17909103851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/wupatomimimugagexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8054/8503/files/91906983483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9134/6079/files/sodejaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0496/7581/files/44832465946.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_off00005e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E86 5080 bytes
SHA-256: cbea22b9aef11fbbc2475b0f65e53117c63a66bf1811367269e68370c66f2790
font_01_sfnt_off00006fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB7 12972 bytes
SHA-256: c7dab9c9c65d2fca37ec054b3ee441976e6af6efaab322a0fdfa787b78cb6aad

Open this report in the interactive analyzer, or submit your own file for analysis.