Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc10146c3c95a529…

MALICIOUS

PDF

49.2 KB Created: 2020-08-29 19:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da2a2ee053f8680643e0663c29085c84 SHA-1: af0fc31c09420782a8ed9d33162ffee040478483 SHA-256: dc10146c3c95a5292087fe3f308018bc65db5144779e2a70f09088ba8f3d5972
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one to a known malicious redirector at 'ttraff.club'. The document body, though heavily obfuscated, contains the same URL, suggesting a lure for free downloads. The ML classifier strongly indicated maliciousness, and the presence of numerous Shopify links points to a link farm used for SEO poisoning to attract victims.

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.club/wix?keyword=house+of+night+destined+free+download
    • https://cdn.shopify.com/s/files/1/0428/2001/0140/files/pediatric_soap_note.pdf
    • https://cdn.shopify.com/s/files/1/0438/6881/5528/files/interview_guide_definition.pdf
    • https://cdn.shopify.com/s/files/1/0435/3576/1576/files/jupyter_display_image.pdf
    • https://cdn.shopify.com/s/files/1/0436/6965/1606/files/zozebelupepibedixewa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3483/files/42660659950.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0296/files/pewitafisegiwaw.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b48bc90b04548f5aeea4302140446c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2864dfdc6b74f54b4400425f39492dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d6c68ede7ab4d0985bd823f7434ac85.pdf
    • https://static.usrfiles.com/ugd/b8c837_14528a42e0e348f6a6ba60112970bfb4.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/gekonilafuzajejuxikefo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/netidetikakabimopi.pdf
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/93116271028.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_off00007407.bin
303fa373d4b9bbc45826520bf4945792d57358a82e0b242941703a10d572a3e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7407 5104 bytes
font_01_sfnt_off00008565.bin
e2b04e3128d83a555ed7ab82830f0d9d33805e73d906627ceda33d8c40b19184
pdf-font-stream PDF embedded font (sfnt) at offset 0x8565 10716 bytes
font_02_sfnt_off0000aa18.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA18 4324 bytes