Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a4786833e3ea8a…

MALICIOUS

PDF

96.6 KB Created: 2020-08-22 18:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2fe060772ea237702d495a9888babcb SHA-1: 6867da6c3c741bdb180b0f6829502a6a493cf556 SHA-256: 09a4786833e3ea8a8f8ab82611741304bd2916f4ffc2429f3ce3a8ac61aca3be
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as nutritional information. This redirector likely leads to further malicious content or exploits. The PDF also hosts a link farm of other PDFs, suggesting an attempt to manipulate search engine results or distribute content broadly. The ML classifier strongly indicates malicious intent.

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=bonne+maman+jam+nutritional+information
    • http://files.twrcma.com/uploads/1/3/0/7/130775205/nabob.pdf
    • http://files.hanovergardenclub.com/uploads/1/3/0/8/130814923/xefikemetodi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0213/3656/files/49596759221.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/visaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/3027/3434/files/53217810421.pdf
    • https://cdn.shopify.com/s/files/1/0432/4461/7885/files/tubufa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2670/0696/files/58053737187.pdf
    • https://cdn.shopify.com/s/files/1/0434/7117/5846/files/73783823629.pdf
    • https://cdn.shopify.com/s/files/1/0461/5346/6019/files/32307091533.pdf
    • https://cdn.shopify.com/s/files/1/0434/1796/0600/files/deberobisezemakudigufa.pdf
    • https://cdn.shopify.com/s/files/1/0435/6440/0798/files/taxujad.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6460/files/aloe_vera_skin_gel_formulation.pdf
    • https://cdn.shopify.com/s/files/1/0431/6508/9949/files/robert_half_salary_guide.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_off00013ffd.bin
5a7ff622bc87098ea5ba0de2f3af26dcc849b7104daeb7fdc498e42e3ee8c623
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FFD 4860 bytes
font_01_sfnt_off0001506e.bin
689343b0273f03b5c02f145233d6d8784db226842ba908719c3dcad786c7dc8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1506E 10652 bytes