Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9ad211d4dafb61…

MALICIOUS

PDF

47.2 KB Created: 2020-08-01 11:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4554851d968f44ba905a4ab81d57a04 SHA-1: 63db87b36c59340c324669c66e13f599883d2ddf SHA-256: 6e9ad211d4dafb61a6d054c8e7adbe497b3fcf435cf77015d7557a1b073147ec
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link that redirects to a known malicious infrastructure, likely to host further malicious content or phishing pages. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute malware widely. The ML classifier strongly flagged this PDF as malicious.

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=battlefront+2+pc+cheats
    • http://files.ballatsmithycottage.com/uploads/1/3/1/8/131857734/levavesoje.pdf
    • http://files.yefeart.com/uploads/1/3/2/6/132682542/e5e2f1a5222ee9d.pdf
    • http://files.alexxross.com/uploads/1/3/0/8/130873718/guvurepefuf.pdf
    • http://files.ontherockscrystals.com/uploads/1/3/0/7/130740142/nopufuteduz.pdf
    • http://files.triberoastingco.com/uploads/1/3/1/0/131070362/wegarima_kadupaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3053/6614/files/jariw.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6460/files/pavojowixomaroremisig.pdf
    • https://cdn.shopify.com/s/files/1/0439/1151/2232/files/wifivixiresogululexike.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2103/files/sedebowukava.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/badogutadosivi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/nerefe.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1256/files/92994061216.pdf
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/97831009633.pdf
    • https://cdn.shopify.com/s/files/1/0437/1080/8216/files/zuduzigalopejetele.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/fuwolilizamijavabifew.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/79078443113.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bc1.bin
8e65c68b9bf10e9428c9f1823894394e5e48496c386e4bed2adb117e1fb24031
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC1 5284 bytes
font_01_sfnt_off00008dba.bin
cc731ee550e4d59f00ca63dbb6e6b5669456493ff116f7a99064a6b6d4cca60a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBA 10160 bytes