Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6c57003843b87e…

MALICIOUS

PDF

35.9 KB Created: 2020-08-10 16:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 69177c9bbc7b9a577236c0a2af88d9c2 SHA-1: 5170df2e10c60a0c61b1e8794ab13fa5c82a2b46 SHA-256: bc6c57003843b87eb6b2dcaf2e2e5422cf3f91df0207d86f393101fba7fb698f
194 Risk Score

Malware Insights

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

The PDF file was flagged for containing a malicious redirector link and a large number of external PDF links, indicating a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=numerical+methods+and+statistical+techniques+using+c+pdf. The document body contains obfuscated text and numerous URLs, reinforcing the finding of a link farm designed to lure 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=numerical+methods+and+statistical+techniques+using+c+pdf In PDF document text
    • http://files.kwikwashlaundromat.com/uploads/1/3/0/7/130739116/7469494.pdfIn PDF document text
    • http://files.gloryb2g.com/uploads/1/3/1/3/131398251/toroxef_zipuveduzovo.pdfIn PDF document text
    • http://files.fatherkeyes.com/uploads/1/3/0/8/130874379/narorip_kurimalidalava_kaxanuzeza_kivejowu.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/1/0432/5661/0979/files/fizevagexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7135/7596/files/38925412693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/doxogolesutezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/extract_mp3_from_mp4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7049/6661/files/91523875442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5263/7091/files/energies_renouvelables_au_maroc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3284/5207/files/amazon_fire_7_tablet_user_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6123/9192/files/21346002447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7108/6492/files/nuloxajusevudegonav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/7547843358.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5865/8469/files/25635777674.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 4

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_off00004c24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C24 5664 bytes
SHA-256: a3ca7f23e0662382e2bb6a0ff65bb6a7d785fd41246feeb66f49b4e1d6c1155f
font_01_sfnt_off00005f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F38 10292 bytes
SHA-256: 270b59e78c05e7fc91adc1ccffe37516f97570122ebd3444020aff804b8d775f

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