Malicious PDF — malware analysis report

Static analysis result for SHA-256 663f5e936f753302…

MALICIOUS

PDF

42.8 KB Created: 2020-08-23 01:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6250a32629b5a11402b3861ab55026d SHA-1: a983a5b02f541e170b849517c2f9b011cefae2d7 SHA-256: 663f5e936f7533025ff2b1058e1329b575b60d432d74f43186d9938d491c6eeb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector at `https://ttraff.cc/pify?keyword=free+translation+pdf+to+word`. This suggests the document is designed to trick users into clicking malicious links, likely as part of a phishing or scam campaign. The presence of many external PDF links, some potentially generated for SEO purposes, further supports this. No scripts were extracted, but the embedded URLs are the primary indicators of 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.cc/pify?keyword=free+translation+pdf+to+word
    • http://files.siliconvalleystalent.com/uploads/1/3/2/8/132815882/2090394.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8982/1847/files/88493864675.pdf
    • https://cdn.shopify.com/s/files/1/0463/2756/2401/files/58668875646.pdf
    • https://cdn.shopify.com/s/files/1/0433/5019/6392/files/vujug.pdf
    • https://cdn.shopify.com/s/files/1/0433/5081/8981/files/95844111716.pdf
    • https://cdn.shopify.com/s/files/1/0437/8843/5613/files/articles_on_national_action_plan.pdf
    • https://cdn.shopify.com/s/files/1/0433/7218/3710/files/95923745723.pdf
    • https://cdn.shopify.com/s/files/1/0428/3305/1814/files/14756350071.pdf
    • https://cdn.shopify.com/s/files/1/0436/6378/6137/files/spanish_grammar_in_context_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0427/3537/0407/files/zolowasutirofatefap.pdf
    • https://cdn.shopify.com/s/files/1/0432/3845/7501/files/saxugogaxinijuvazelumam.pdf
    • https://cdn.shopify.com/s/files/1/0435/8632/2600/files/5130872062.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_off00006b44.bin
74ceea2287c01f15ab6f38505d493fe3125158c05806a1fd5e1611d519d2a4f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B44 5084 bytes
font_01_sfnt_off00007cb1.bin
8520cbabe8640cc579359256dba8298c7155b8b02ae2abb817c7f7701815919f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB1 10024 bytes