Malicious PDF — malware analysis report

Static analysis result for SHA-256 119ade16bf1afea9…

MALICIOUS

PDF

45.4 KB Created: 2020-09-21 03:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32bc6b6a07e27ec2761ad350bfd5fcf7 SHA-1: 4603b35f96d0fc84649cbf0c4ad1c87551753d7a SHA-256: 119ade16bf1afea9582533ac8cfb0c8850076a7ebfa4f369af14356688350df4
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.me/wix?keyword=antigone+study+guide+teacher+copy. Additionally, the PDF acts as a link farm, containing numerous links to other PDFs, many of which are hosted on Shopify but some point to unknown domains. The ML classifier also 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.me/wix?keyword=antigone+study+guide+teacher+copy
    • http://jupaxime.lifecoachingtoronto.com/uploads/1/3/1/4/131407901/b3b98ce.pdf
    • http://wofovato.holtonhomeplace.com/uploads/1/3/0/7/130739607/e447a1.pdf
    • http://nixoda.welldoneexperience.com/uploads/1/3/0/7/130776326/vexufeberepeki.pdf
    • http://lajupusu.thelittleacorninmontgomery.com/uploads/1/3/1/3/131398504/4042831.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0463/0354/3458/files/hoedown_whose_line_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64255738852.pdf
    • https://cdn.shopify.com/s/files/1/0432/5212/1762/files/6007591257.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83142526711.pdf
    • https://cdn.shopify.com/s/files/1/0463/5695/5302/files/nixepesewegilavupadozupu.pdf
    • https://cdn.shopify.com/s/files/1/0463/0495/2477/files/74756626448.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3133/files/lufufimapagi.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_off00006b4d.bin
865b65f29330a9c53393a9c65b4ec558faeffe7c833dd0b36f0ee190a779f8d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4D 5392 bytes
font_01_sfnt_off00007da5.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA5 1800 bytes
font_02_sfnt_off00008632.bin
5214f2ef860a9eb9db952d6da1a8e76fd202d749ac1928eb9d3b86a3ffb80c55
pdf-font-stream PDF embedded font (sfnt) at offset 0x8632 10160 bytes