Malicious PDF — malware analysis report

Static analysis result for SHA-256 117badfa3f187b8d…

MALICIOUS

PDF

43.7 KB Created: 2020-09-08 19:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a518da9a806ca21cb414bbfbe497a072 SHA-1: d2f026e7da2f134fdd8c0c014b9d049f6dbb666d SHA-256: 117badfa3f187b8db6fe0b1a4c5b039670ff44dbf172815fb927aabcc22149bb
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.club'. The document body also contains this URL along with a large number of other Shopify-hosted PDF links, suggesting a link farm designed to attract traffic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious links indicates an attempt to redirect users to harmful content.

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.club/wix?keyword=latest+tamil+movies++website+list
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/4151/3894/files/31436833485.pdf
    • https://cdn.shopify.com/s/files/1/0463/2841/4369/files/13874362646.pdf
    • https://cdn.shopify.com/s/files/1/0432/8472/5926/files/56347189472.pdf
    • https://cdn.shopify.com/s/files/1/0437/8607/6309/files/pusaxagepolof.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/hybridization_orbitals.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6469/files/19260837414.pdf
    • https://cdn.shopify.com/s/files/1/0431/4873/8720/files/vepogidujadolup.pdf
    • https://cdn.shopify.com/s/files/1/0437/6638/2749/files/88669160949.pdf
    • https://cdn.shopify.com/s/files/1/0427/9212/4572/files/bihar_stet_2020_english_question_paper.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/exceptional_c_47_engineering_puzzles.pdf
    • https://cdn.shopify.com/s/files/1/0432/7168/4252/files/vazir.pdf
    • https://static.usrfiles.com/ugd/b4a829_cfe4e1f4d4bb471a8668cac4692f785e.pdf
    • https://static.usrfiles.com/ugd/2e79a6_b968f0796e504823b1f6c09d9095abbb.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_off0000621c.bin
855fdb5f248923184b9f9e2cc24146baba2fbcbb1e136ff0799b1d9b6b1aa117		 pdf-font-stream PDF embedded font (sfnt) at offset 0x621C 4652 bytes
font_01_sfnt_off00007203.bin
be23cb07a682d2859e096a837e406a1084cb39d2446c02f096ae2954025b1036		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7203 9948 bytes
font_02_sfnt_off0000941a.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x941A 4324 bytes

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