Malicious PDF — malware analysis report

Static analysis result for SHA-256 657f0aa5948c35ac…

MALICIOUS

PDF

52.3 KB Created: 2020-08-01 16:25:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d83d68895e253ff4806b980842dbc8a2 SHA-1: 2ff06d6bdf1fba25bc28cdf3098e237c34e2bdd7 SHA-256: 657f0aa5948c35ac7d5665efe7079568db6b497934923506e210e815e34f27ff
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body, though heavily obfuscated, contains the same redirector URL, suggesting an attempt to disguise its malicious nature. The presence of a large number of PDF links, some leading to benign Shopify URLs, indicates a link farm or SEO manipulation tactic to distribute 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.ru/pify?keyword=python+dictionary+append In PDF document text
    • http://files.nikarey.com/uploads/1/3/0/9/130968984/f3d738c0178.pdfIn PDF document text
    • http://files.phoenixhypnobirthing.com/uploads/1/3/1/4/131408942/majirakubit_fariwiwemajaren_rumanurimonizeg.pdfIn PDF document text
    • http://files.suyana.net/uploads/1/3/1/0/131070539/fepizimomuk_xibobofem_gaguzeligofuzu.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/1/0429/5249/1159/files/xukajajedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8982/0836/files/rorapa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9162/3074/files/marco_gonzales_fangraphs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7426/4993/files/7075964148.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/mumudejimizigigorew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5848/6678/files/31891059840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8531/5744/files/38761609933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/49224855015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/28298891164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/45315666286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4790/3654/files/54723055454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/dematubovaxudi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1928/0288/files/28731682361.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_off000084e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E0 5052 bytes
SHA-256: 50f82c7af2e8f2cd3e26c16ce93be39be8d31c9d30de2de1221a90b643d92d5b
font_01_sfnt_off00009616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9616 14556 bytes
SHA-256: 8c81c1ef0a56ae220ec5468a719a16965e4d9827983f108230588323e86ac9c8

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