Malicious PDF — malware analysis report

Static analysis result for SHA-256 06316f6a97751924…

MALICIOUS

PDF

33.7 KB Created: 2020-08-04 04:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ea8260400d02a10e0fac95e3cf6b467 SHA-1: 21372e65f36c7ea2d0b8a73b9e4ae0fa83212ae9 SHA-256: 06316f6a97751924da0e17be423cfab8dc5ed77f40ea6e1020776e699d57f2e3
154 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its inclusion of a link farm and a redirector URL. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=bsava+manual+of+canine+practice+pdf, which is a known malicious redirector. The presence of numerous other links, many pointing to Shopify-hosted PDFs, suggests a tactic to manipulate search engine results or distribute further malicious content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.com/pify?keyword=bsava+manual+of+canine+practice+pdf
    • http://files.myoutdoorvisions.com/uploads/1/3/2/3/132302940/pisatu.pdf
    • http://files.cjearle.com/uploads/1/3/0/7/130775484/3ad73f1d2a9.pdf
    • http://files.hokuloaoutrigger.com/uploads/1/3/1/4/131406337/wagefitatow-mizinosuziximu-netukigeb.pdf
    • http://files.ffsdf.org/uploads/1/3/1/4/131407135/3326416.pdf
    • http://files.signatureofstuart.com/uploads/1/3/0/8/130874324/dibifopozi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/66514614259.pdf
    • https://cdn.shopify.com/s/files/1/0437/5396/3678/files/medal_of_honor_airborne_patch_v1._1.pdf
    • https://cdn.shopify.com/s/files/1/0432/1958/3133/files/libomagosekifen.pdf
    • https://cdn.shopify.com/s/files/1/0432/4353/6552/files/60113070056.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/volobufepafolosovi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0772/8023/files/dibizagirevanokezolus.pdf
    • https://cdn.shopify.com/s/files/1/0437/5461/9041/files/rudipalerofezesevax.pdf
    • https://cdn.shopify.com/s/files/1/0438/7130/5896/files/94752521230.pdf
    • https://cdn.shopify.com/s/files/1/0434/9090/2166/files/62391155459.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/634789827.pdf
    • https://cdn.shopify.com/s/files/1/0433/5311/2735/files/fagorowasaxodusexomuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/2468/7014/files/rae_sremmurd_no_type_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/6963487263.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_off00004851.bin
4bc1c28b8ebad57ac25c23de6c360f4fd29a749ef444cedc0c0662f4ec57940f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4851 5412 bytes
font_01_sfnt_off00005aab.bin
9006c942ef03d346c3a05a0a6835c2eeb3128065f4cb60caad4d06d4e46a0079		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AAB 9124 bytes

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