Malicious PDF — malware analysis report

Static analysis result for SHA-256 0863624877ab99a4…

MALICIOUS

PDF

46.9 KB Created: 2020-08-17 17:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c9b2069943ed74e145648defdf0d9c0 SHA-1: 06b41ff03a061fd106ef6193444d48fa150690be SHA-256: 0863624877ab99a429bdbf09d54b0c339e62eb0464486bce7ba798df56d2695a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to shopify.com domains, but also includes a critical link to a known malicious redirector at ttraff.ru. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=nariman+malayalam+movie+bgm
    • http://files.myrandastangeland.com/uploads/1/3/1/3/131384208/rixelutawejot.pdf
    • http://files.christinecarr.com/uploads/1/3/2/6/132682685/nuwimijuwuko.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32878299647.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5974/files/77963834442.pdf
    • https://cdn.shopify.com/s/files/1/0429/2267/2284/files/506_assignment_answer_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/8144/9118/files/gadituwoxetajo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/46952555234.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/50357299980.pdf
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/42276055653.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lorabo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/3994392769.pdf
    • https://cdn.shopify.com/s/files/1/0430/8031/9130/files/adjectives_prepositions_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5002/files/wikibixufibu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2456/1829/files/20776641671.pdf
    • https://cdn.shopify.com/s/files/1/0430/9221/3911/files/ashrae_refrigeration_handbook_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/66832910357.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/lesamegokolizoxufalax.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d16.bin
bcc16abe8ab017d8467aa8cad033bb72057de66942a71b9e6af2c1aaf45e502b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D16 4804 bytes
font_01_sfnt_off00007d59.bin
3f8014eeb20547a791d583cc455903a77cb974cb5931caef0672bc9a201c7fd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D59 10096 bytes
font_02_sfnt_off0000a005.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA005 4324 bytes

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