Malicious PDF — malware analysis report

Static analysis result for SHA-256 e50dc51bad5abc2b…

MALICIOUS

PDF

41.8 KB Created: 2020-08-19 11:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b31a11c3fcf5b6effba345e279931d3b SHA-1: 82b4ae7c6c5286b017d902e56b4517b2fca4391a SHA-256: e50dc51bad5abc2b25d144969bafbfa9e810f51f6e4d5ed64fc74c2bfc16c770
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=mp4+nagpuri+video++2019, suggesting a lure to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=mp4+nagpuri+video++2019
    • http://files.mikefraserphotography.co.uk/uploads/1/3/1/8/131857920/2b2a9b60c21347c.pdf
    • http://files.cainscreativecakes.com/uploads/1/3/0/8/130874114/2505b0fb256da4.pdf
    • http://files.antonbarichconsulting.com/uploads/1/3/1/4/131453494/336dcb71.pdf
    • http://files.aben4ace.org/uploads/1/3/0/7/130776795/romofo.pdf
    • http://files.tucniagara.com/uploads/1/3/0/7/130740033/58967e0.pdf
    • https://cdn.shopify.com/s/files/1/0436/4628/8025/files/kigazuwus.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/3842807996.pdf
    • https://cdn.shopify.com/s/files/1/0429/8955/1770/files/honda_crv_2016_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/9259/0236/files/bupijixagilikumanajaxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/fozuxogatelowuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5598/files/tafujiwepo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8543/0945/files/structural_isomers_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/58388915942.pdf
    • https://cdn.shopify.com/s/files/1/0430/3434/5625/files/analytical_chemistry_by_gary_christian_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/pugajifobadufunuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/7078/3645/files/nonekeku.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_off00004623.bin
327fb2d46860aaab720c4852da4f6671749058df4eb6e069946f3537f2805b4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4623 5552 bytes
font_01_sfnt_off00005929.bin
95035f83aecfa89c533c6992716bf737a73d859ab331a2f900155139def44f61
pdf-font-stream PDF embedded font (sfnt) at offset 0x5929 9768 bytes
font_02_sfnt_off00007a96.bin
9e8409b995ac2b0bb76eb3eb8dd1c90fa55d1c1c8a40bb5daa08ca4080948d13
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A96 18776 bytes