Malicious PDF — malware analysis report

Static analysis result for SHA-256 10c99595b101ab1c…

MALICIOUS

PDF

47.8 KB Created: 2020-08-15 03:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dcb4d7e8cf4498a8ee9982d0f46fed15 SHA-1: 7d030b7992872eb1399c52c8435ce6ce315e6290 SHA-256: 10c99595b101ab1cbbece15c52e6874945a6a545fbec487dbc9aabb62cf589f4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to redirector infrastructure. The primary redirector URL, 'https://ttraff.ru/pify?keyword=cash+book+format+for+housing+society', is flagged as malicious. This suggests the document is part of a link farm or SEO poisoning campaign designed to trick users into downloading further malicious content. No scripts were extracted, but the embedded links are sufficient to indicate a malicious intent.

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=cash+book+format+for+housing+society In PDF document text
    • http://votesud.pulsefitnessmandan.com/uploads/1/3/0/8/130814310/9198440.pdfIn PDF document text
    • http://files.modularis.co.uk/uploads/1/3/2/7/132710683/xirate-bexifag-betolaxefofov-ririkofaxon.pdfIn PDF document text
    • http://files.moldingconfidentme.net/uploads/1/3/2/6/132695478/5638472.pdfIn PDF document text
    • http://pixawed.shopamityvilleapothecary.com/uploads/1/3/1/4/131437402/2388486.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/1/0433/4977/0395/files/62420781972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/making_a_play_abbi_glines_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4959/9654/files/calendario_serie_b_2020_20.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/sad_heart_broken_wallpaper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/betemefamixiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0594/1672/files/sogezatom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6587/6378/files/tales_of_the_arabian_nights_book_of_tales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4262/5953/files/digital_photography_school.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
🗂 Part of campaign: blues-city-kids.com 7 samples

Related samples 6

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_off00007346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7346 5476 bytes
SHA-256: b02debea27a2cf5da48d7e73113cd283ca464d4a2c7b5e7905d6495fba5da7bb
font_01_sfnt_off000085cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85CC 14332 bytes
SHA-256: af4c2ce224f927c9b9dad0c23ee00c24afd048f5a34571ce4bba48ce147842ca

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