Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a9bb317ceccb92c…

MALICIOUS

PDF

47.1 KB Created: 2020-09-01 09:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4ba0405e2a027ae32ceb371e7911566 SHA-1: 58b0f71d85dc8f1266b46659a4df645b252b1e07 SHA-256: 5a9bb317ceccb92c6fe0169aceb39936fb275dd01109967eb1effa24c7edd7ef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, a technique often used for SEO link farms or to redirect users to malicious sites. One prominent link, 'https://ttraff.ru/wix?keyword=cinematic+camera+app+android', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is designed to lead 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.ru/wix?keyword=cinematic+camera+app+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/9529/2059/files/cargo_manifest.pdf
    • https://cdn.shopify.com/s/files/1/0431/7862/3138/files/ultralight_backpacking_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0435/8845/2515/files/juwavafi.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c4be4313a44495b99655cff6b94bfca.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f3a9ddee2ac4fa8aebb495f930efb40.pdf
    • https://static.usrfiles.com/ugd/e32576_5966532f83f24ab09a566a286abebdd2.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1792/files/68452556948.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75130531250.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea840c07449841309ba662df1533cf19.pdf
    • https://static.usrfiles.com/ugd/b8c837_a3081d5f113847e3815b5218372ceb27.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_off00006f10.bin
35f79c43a0c802e08a373785b3ab4cba89060dde6d0502d046c2080cf9987f43
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F10 4820 bytes
font_01_sfnt_off00007f4f.bin
86f042c271d017bc9ecf5f4ddae74df5391ab0db1a7068d239fc2ffebd3d8efd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4F 10292 bytes
font_02_sfnt_off0000a1d4.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1D4 4324 bytes