Malicious PDF — malware analysis report

Static analysis result for SHA-256 c57176b249cec89a…

MALICIOUS

PDF

43.8 KB Created: 2020-09-01 19:21:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e79209e5d3e54edf7a1bd7bd3d5500ef SHA-1: 97a3aecff0a50be82a96936dea0771e2b78c3bed SHA-256: c57176b249cec89a5423d2b9c96be136c58cec4f5542f4ee0850ce9b35b77b43
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.me', which is associated with cryptocurrency scams. Additionally, a PDF link farm heuristic indicates the document is designed to host numerous external links. The ML classifier strongly flagged this PDF as malicious. The document body contains the same malicious URL and a reference to a bitcoin cash address format, reinforcing the scam lure.

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/pify?keyword=new+bitcoin+cash+address+format
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/27980226645.pdf
    • https://cdn.shopify.com/s/files/1/0437/6995/4456/files/nawawolukilorefupem.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/donukelowuniwo.pdf
    • https://cdn.shopify.com/s/files/1/0444/4664/6439/files/java_oop_tutorial_point.pdf
    • https://cdn.shopify.com/s/files/1/0430/8104/0033/files/riwafuwumetawesexen.pdf
    • https://cdn.shopify.com/s/files/1/0434/8434/8569/files/42931228524.pdf
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/fogosokepatunil.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9219/files/2008_saturn_vue_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/5044/0603/files/physiotherapy_for_lower_back_pain_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/kewilerawilavog.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/pitch_perfect_book.pdf
    • https://static.usrfiles.com/ugd/1cc777_3d52e3ac48ac4c408b10280f0a8b24ca.pdf
    • https://static.usrfiles.com/ugd/221f3a_d8b9e09e966545279827fdc64c345f82.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/1/0

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c65.bin
67a5e971b604a7bc58d5b55316fd6f305444c73d5fa70690d57e7f9cccc28829
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C65 5432 bytes
font_01_sfnt_off00007ec5.bin
d07e87f06c768f347ff680be0fa62c935c9da4d4b252ef29fbd2f912984aa4a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC5 10360 bytes