Malicious PDF — malware analysis report

Static analysis result for SHA-256 caf871791286f86c…

MALICIOUS

PDF

40.9 KB Created: 2020-08-09 06:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8f9220be82bbe9aa034a2617a12632d2 SHA-1: a689800c2a851c6a9b59a54e26bea00dfafc7652 SHA-256: caf871791286f86c99663829f42d4b7688ada4fb645a693211d5c4d4fd2223af
194 Risk Score

Malware Insights

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

The PDF file was flagged for containing a mass external PDF link farm, with 30 generated SEO PDF links. One of the embedded URLs, https://ttraff.ru/pify?keyword=aaa+idp+application+pdf, is identified as a malicious redirector. The document body contains obfuscated text and references to the redirector URL, suggesting an attempt to lure users to malicious content or manipulate search results.

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=aaa+idp+application+pdf In PDF document text
    • http://files.4140designs.com/uploads/1/3/2/7/132712483/molari_xeserapa_zozanagisuraji_xijereb.pdfIn PDF document text
    • http://files.khrystaljcounseling.com/uploads/1/3/1/4/131407227/289c42bf30.pdfIn PDF document text
    • http://files.kimkirch.com/uploads/1/3/0/7/130775827/welobozutudirol-fulunim.pdfIn PDF document text
    • http://vagok.filter-equipment.com/uploads/1/3/1/1/131164250/4937439.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/1/0448/5152/7842/files/how_to_move_steam_games_to_ssd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7437/8138/files/85039257857.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/pesil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1342/2753/files/33016886249.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9799/5941/files/60124991795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5387/4329/files/matididuxogupokeximaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/13373834438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/how_to_let_discord_use_mic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2437/5194/files/55642491515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1485/5583/files/wevepej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0753/1432/files/babufepebetinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/kenejezezojuxoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/30411556640.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_off0000634b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634B 4864 bytes
SHA-256: 6b52727641614d911b624525da8a727d5bdf855aa8a3e169b59dd25e6124ab21
font_01_sfnt_off000073f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73F6 10268 bytes
SHA-256: b5cd9a7383ac9a43837028f2a0e1a870f2cab10c68c4ccc51e9ef169ae55cd7e

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