Malicious PDF — malware analysis report

Static analysis result for SHA-256 66b4dbddcc4b57f4…

MALICIOUS

PDF

45.9 KB Created: 2020-07-23 17:19:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d81f275d45fec7b3d04c0fd9b1ce8a66 SHA-1: c8e413b0613818a093dd1a682352be7b6df38ee5 SHA-256: 66b4dbddcc4b57f4e1e2d7756159ce5fed1f96d1db66ddd02df4c00e5bccf6a5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to redirector infrastructure, specifically pointing to 'ttraff.com', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'bombsquad apk free', suggesting a lure for users to download software. The presence of numerous external PDF links further indicates a link farm or SEO manipulation tactic to distribute the malicious content.

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.com/pify?keyword=bombsquad+apk+free In PDF document text
    • http://files.ocmsmedicaljobs.org/uploads/1/3/1/4/131407965/pagojaji-lefifinogujil-lexininebu-malep.pdfIn PDF document text
    • http://files.anis.nu/uploads/1/3/0/7/130739470/d7274e03428.pdfIn PDF document text
    • http://files.niwotptac.com/uploads/1/3/2/3/132302768/8803648.pdfIn PDF document text
    • http://files.entsocont.ca/uploads/1/3/0/9/130969153/7350385.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/1/0429/8155/6375/files/rixogopexutuserep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9479/3630/files/dexoturen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1678/8900/files/jaxigekif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3608/0288/files/mojek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7931/1268/files/80962624851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12086745869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/tosusifasikoleje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/41970507976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/21070841935.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/nifenabedawugenosiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/63042484705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4887/6702/files/suvafurilabibijetiren.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 7

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_off00007730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7730 5184 bytes
SHA-256: 0235bbd785075b1556dd00806a26f76ea75e000149f772cd517712be0de067e7
font_01_sfnt_off000088c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C1 9908 bytes
SHA-256: 6ee2ff1074ace76e8e2cd62c981dd4f7cf1452e7b2309edd3ab032e9e5db5237

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