Malicious PDF — malware analysis report

Static analysis result for SHA-256 81c57daf24793f61…

MALICIOUS

PDF

47.9 KB Created: 2020-08-27 14:10:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f1d119267c9f09d89e7ed0141cb40437 SHA-1: 69a629f4e63f726503857ba00622d1a23392b474 SHA-256: 81c57daf24793f615a83184114dcdfbe284404e1473158a2a13383d249b201f5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded links pointing to redirector infrastructure, specifically identified as a link farm for SEO phishing. The primary redirector URL, 'https://ttraff.ru/pify?keyword=ddo+shadow+crypt', is flagged as malicious. The document body, though heavily obfuscated, contains this URL and references to 'ddo shadow crypt', suggesting a lure related to cryptocurrency or a similar theme. The ML classifier also strongly indicated maliciousness.

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=ddo+shadow+crypt In PDF document text
    • http://gigamo.eyeholejig.com/uploads/1/3/1/6/131606165/fbe343e38846a8.pdfIn PDF document text
    • http://korawes.allabouttrumpet.com/uploads/1/3/1/4/131407082/wenifovux.pdfIn PDF document text
    • http://files.paolospazzini.com/uploads/1/3/1/4/131483108/6370149.pdfIn PDF document text
    • http://files.holyspiritlv.org/uploads/1/3/1/4/131453253/daguzifesikuk-netenulasiduv-wojot.pdfIn PDF document text
    • http://files.slowmusic.pl/uploads/1/3/1/3/131380308/1878492.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/1/0434/4948/3420/files/pivanakimedip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/book_cover_page_design_psd_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5172/9567/files/xexigozeferusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0944/9884/files/allegories_of_reading.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9005/8147/files/7193960218.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8250/5628/files/sound_of_silence_disturbed_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6900/4190/files/91129245072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/7271520956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/29901183425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8741/3923/files/flight_search_apps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4835/2406/files/dirikebufotuwiludujaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3444/2908/files/verobexili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3505/5512/files/gegem.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_off000070de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70DE 5320 bytes
SHA-256: 885765544bd1917a7c2528f3164f7b0ebe90db01f9cfad246c245df9aceee8a6
font_01_sfnt_off00008310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8310 15276 bytes
SHA-256: 2ebd1d8e961119d042cb12ad0cdbb7e0079d901fa2b9b4aea23ed6693e2b8980

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