Malicious PDF — malware analysis report

Static analysis result for SHA-256 e595709432d3ffcd…

MALICIOUS

PDF

57.0 KB Created: 2020-08-03 16:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac816e7681905d461828468f0f19fb52 SHA-1: d29deb2c85400729a4511afb6524cf8c2b56e8cd SHA-256: e595709432d3ffcd0a69d97abe87b81c2640c01720b3d2a219b81be90aef434d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests the document is part of a link farm designed to obscure the ultimate destination, which is likely malicious. The ML classifier strongly supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=analytical+method+development+hplc+pdf
    • http://files.ittakesdeathtoreachastar.com/uploads/1/3/1/3/131384791/4623950.pdf
    • http://files.tcstars.com/uploads/1/3/2/6/132696263/wapovolavadun.pdf
    • http://files.breastlearningonline.com/uploads/1/3/1/0/131070754/nuwozin.pdf
    • http://files.suezn.com/uploads/1/3/1/6/131637357/ganolutiwefutudoso.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9270/files/42416982834.pdf
    • https://cdn.shopify.com/s/files/1/0432/8754/3964/files/bidugomakiluladazi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/foxesisusig.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1791/files/bewirifesibalekojitap.pdf
    • https://cdn.shopify.com/s/files/1/0437/3577/7445/files/gitot.pdf
    • https://cdn.shopify.com/s/files/1/0430/2172/9955/files/68159012462.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8233/files/gobusizupagox.pdf
    • https://cdn.shopify.com/s/files/1/0433/2548/9305/files/juteto.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/welilavuruwad.pdf
    • https://cdn.shopify.com/s/files/1/0430/8339/9321/files/58533458213.pdf
    • https://cdn.shopify.com/s/files/1/0435/5974/7745/files/69194147900.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_off00009814.bin
a596b331df0c9d8c40fdea56a557f6fbfd29588e6e2f9ef6623e9e8743d41e7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9814 1612 bytes
font_01_sfnt_off0000a01f.bin
1ae742ca721182ed27761331daf4263c773e1fd3d07b724c0650b78ba8346fc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA01F 5272 bytes
font_02_sfnt_off0000b1fe.bin
5e8f2deaefe4da76d6e82a3aee3e87bb253f81753241fb9dbd6be13a86fdf1b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1FE 10668 bytes

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