Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ad3ffc4436d0b3…

MALICIOUS

PDF

47.3 KB Created: 2020-08-21 07:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4a1a4192fa0e2e5891e31c7e4b1f747 SHA-1: 1459ac2894f6cf7a29a98debb5a9bfc90fd656c9 SHA-256: b2ad3ffc4436d0b3e8f0327bb15bce3d317a34dc4b3cd935b405aa736decce5b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a lure for "Illinois boating license test answers" which, upon clicking, redirects to the malicious URL https://ttraff.cc/pify. This URL is flagged as a known malicious redirector. The document also contains a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness.

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.cc/pify?keyword=illinois+boating+license+test+answers
    • http://teleki.bedfordbiblechurch.com/uploads/1/3/1/8/131857252/ea8b0.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/pidotikazajezovogowezi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/rajukase.pdf
    • https://cdn.shopify.com/s/files/1/0439/4795/0248/files/19770756154.pdf
    • https://cdn.shopify.com/s/files/1/0428/2207/4534/files/business_card_design_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/celebrity_cruises_excursions.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovetutokukike.pdf
    • https://cdn.shopify.com/s/files/1/0437/0399/2474/files/14548775260.pdf
    • https://cdn.shopify.com/s/files/1/0437/6192/6293/files/interstitial_lung_disease_pathology.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/
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/pidotikazaj

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a5b.bin
7fadc840395fc1b891c5339624b4d7de96f1e715fb49498fc89cd7e8658f275f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5B 5136 bytes
font_01_sfnt_off00008bf0.bin
654193c376ba889b089abe38fda89fb27e843088237fc1445be89c4639676852		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF0 10772 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.