Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa685a1714809a2e…

MALICIOUS

PDF

39.2 KB Created: 2020-08-15 11:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f7b01084b208502f0453ef51309428a2 SHA-1: 75561d7ecb5032b9cf4a3228f7aa65a02056e3d7 SHA-256: aa685a1714809a2efd243f65b7246275ffbde53d32985954bd31785337af8a44
194 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains multiple embedded links. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/wb?keyword=lindsey%20adelman%20diy%20pdf'. Another critical heuristic indicates a PDF link farm, with numerous links pointing to Shopify domains, likely serving as a distribution mechanism. The document body contains obfuscated text and the primary malicious URL, suggesting a lure to a phishing or malware delivery site.

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/wb?keyword=lindsey%20adelman%20diy%20pdf In PDF document text
    • http://files.theoldvicarageotterton.com/uploads/1/3/1/0/131069824/9600b75bed38a72.pdfIn PDF document text
    • http://files.bullengarookadultriders.com/uploads/1/3/2/6/132681596/fomapofegaro-wopigadazodup-zevevamer-tirexilagenizo.pdfIn PDF document text
    • http://pinux.mustangsbasketball.com/uploads/1/3/1/3/131379698/4022827.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/1/0431/9494/1603/files/36658258458.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7281/4245/files/nidetuvefuwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3631/8616/files/bise_sukkur_result_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7396/1125/files/winunejopasixabanawetegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7902/4292/files/four_main_branches_of_philosophy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/sodixikerikexinaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9707/9460/files/birthday_wishes_for_sister_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5706/9736/files/weather_report_birdland.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/98057865301.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_off00005ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA7 5136 bytes
SHA-256: 7e6e335107347fb0947ebcd2fcc3ea3bea2a73cd25826718001c24dd5646f863
font_01_sfnt_off00006d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1C 10300 bytes
SHA-256: 47858e394ee9c32946db7c9c0bbf659abff4b6014296e509ea76b3bb6a3b52fd

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