Malicious PDF — malware analysis report

Static analysis result for SHA-256 465ee399a4d1693a…

MALICIOUS

PDF

43.1 KB Created: 2020-08-30 22:36:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cd49f331428f8b730e7d3af8d559d40 SHA-1: 7fbc61bc8706ab4c9e8ef93359e39e2ec9861a07 SHA-256: 465ee399a4d1693a4993b328e50645fe42a9f63990635ba3c564930732b05fcd
152 Risk Score

Malware Insights

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

The PDF contains a link disguised as a movie streaming lure ('watch insurgent online free') that redirects to a known malicious domain (ttraff.com). The PDF also contains a large number of links to other PDFs hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive link.

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/wix?keyword=watch+insurgent+online+free
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/zunisok.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/70346444346.pdf
    • https://cdn.shopify.com/s/files/1/0450/3817/4372/files/20282254949.pdf
    • https://cdn.shopify.com/s/files/1/0429/6366/5055/files/149854634.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ziwodukujaluladiludu.pdf
    • https://cdn.shopify.com/s/files/1/0463/0672/1957/files/la_bella_y_la_bestia_original.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5774/files/muludapepogowikesisovagop.pdf
    • https://cdn.shopify.com/s/files/1/0438/5849/3600/files/algebraic_identities_with_proof.pdf
    • https://cdn.shopify.com/s/files/1/0439/0472/9243/files/diridoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1495/4918/files/30177440824.pdf
    • https://cdn.shopify.com/s/files/1/0436/9547/2794/files/walter_lewin_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dadimutixiwukigojubiw.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cdd.bin
caaf15eef8834c0e87f4979a14def7623562ec8aeb4870b3784f6cee5e48c100
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDD 5036 bytes
font_01_sfnt_off00006dfa.bin
726a305c47a0c0400c6625114d34750e6c6ddcadf373890c52c6569dbb0058f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFA 10420 bytes
font_02_sfnt_off000091a4.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x91A4 4324 bytes