Malicious PDF — malware analysis report

Static analysis result for SHA-256 148f8d30e4bcf907…

MALICIOUS

PDF

38.5 KB Created: 2020-08-07 10:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c4c6e40ff96f71841bc19ba63ef5b94e SHA-1: 6d5ce4ed52b16bfeadcfbdf9c6f227bc4f6288d5 SHA-256: 148f8d30e4bcf9075e66689272b6b3a46983294ae8613387ce706797d2b44351
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains the same malicious URL and appears to be a lure for free PDF downloads. This suggests an attempt to direct users to malicious infrastructure, likely for further exploitation or phishing.

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=cultural+anthropology+asking+questions+about+humanity+free+pdf In PDF document text
    • http://files.ddsbeautysupply.com/uploads/1/3/1/0/131070393/gujezugupitava.pdfIn PDF document text
    • http://files.charleighwrenco.shop/uploads/1/3/1/6/131606859/vopunox.pdfIn PDF document text
    • http://files.yellowlanternproductions.com/uploads/1/3/1/4/131438419/2654884.pdfIn PDF document text
    • http://zarabi.azacarryout.com/uploads/1/3/1/8/131871674/207a5d8e46b5d9c.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/1/0430/4614/2114/files/love_ina_manga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4375/7985/files/88710188096.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/42152435777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2641/3725/files/karel_j_robot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6331/1513/files/balanitis_tratamiento_antibiotico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/66338457686.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9512/1319/files/python_map_function.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/62078_iphone_sync.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5852/7397/files/engineering_economic_analysis_11th_edition_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7025/9357/files/49724690750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2831/5293/files/57188145307.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_off00004c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C89 5792 bytes
SHA-256: 066e0f4d82b62813b50a632ce08ff8be103dc08b6648fcf29cbc5fff0bc26364
font_01_sfnt_off00006011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6011 13364 bytes
SHA-256: d98b67c954069e3aff0bfb00784cc4c73403112d6141ea27439d7e1ad2250119

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