Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8385bf1e3f7c7c…

MALICIOUS

PDF

42.3 KB Created: 2020-08-22 02:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e25b63ce2997d20bc00d1fd42bb06e00 SHA-1: 9ddece7a991d31fe8fa01da34ff536152274459b SHA-256: aa8385bf1e3f7c7ca0e1ae636442bf8c907729ebc0f48dd0e9cf7c742a134ab7
202 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) that is flagged as malicious. The document body and heuristics indicate a lure for free downloads, likely to phish for credentials or deliver further malware. The ML classifier strongly supports maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=creation+story+worksheets+for+youths In PDF document text
    • http://files.atonewellness.com/uploads/1/3/1/3/131383398/gananikukikadu.pdfIn PDF document text
    • http://zopipogaz.biocompatibilityhub.com/uploads/1/3/1/4/131453540/wevisabizagono.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/1/0447/2917/2122/files/oxford_discover_grammar_2_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9614/6073/files/sports_and_hobbies_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1157/8776/files/12889239323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5018/8443/files/radomojokatubugaraz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4926/3004/files/11283631529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5609/5644/files/video_editor_pc_32_bit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4940/9950/files/ca_cpt_2020_books_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5915/8946/files/93056863945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0677/0843/files/3dmark_11_demo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1708/4839/files/taxivepokilaril.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 3

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_off0000694a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x694A 4984 bytes
SHA-256: 104df1c8edfefa3affd8206b574b4171c9db95e2051aea90c9123a7b4e0fe223
font_01_sfnt_off00007a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4F 10068 bytes
SHA-256: a3e97779d48df2d620a62bb0088233ed00affedea3294977eeece88dd3d64c2d

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