Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fdaf77fd9b982a7…

MALICIOUS

PDF

57.5 KB Created: 2020-08-05 01:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dac931b4f0039c1fd7d8f616bd04c186 SHA-1: af859ef4adf18e1623faa864e02f4dc45b66918c SHA-256: 3fdaf77fd9b982a7a5c4a0a7d5e578d156bb819121f872258295f5d85e3b5652
128 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a download link for a 'mathematical modelling handbook pdf'. The PDF also hosts a link farm pointing to numerous other PDFs on Shopify, likely for SEO manipulation to increase visibility. The presence of a visual download button lure further supports the malicious intent.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=mathematical+modelling+handbook+pdf
    • http://files.tsdistributing.com/uploads/1/3/0/9/130968972/tafade_saxanosijogov.pdf
    • http://files.tmsapvo.com/uploads/1/3/1/8/131857815/6490800.pdf
    • http://files.backwoodsbeersoap.com/uploads/1/3/0/7/130775598/zanamuwuxudijum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58014629257.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/74335923716.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8327/files/mogenutixat.pdf
    • https://cdn.shopify.com/s/files/1/0433/8545/4757/files/94605800347.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5071/files/98976650958.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/bazeporagevazipafixezugi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9242/5384/files/59149296079.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/ccure_9000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7400/2837/files/19852459744.pdf
    • https://cdn.shopify.com/s/files/1/0434/0698/3318/files/38457856268.pdf
    • https://cdn.shopify.com/s/files/1/0440/8632/9509/files/virtualbox_mouse_capture.pdf
    • https://cdn.shopify.com/s/files/1/0431/6689/2186/files/53905720542.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_off00009426.bin
148887d3deb5cd9a948aa39bb4bce0d85cf2eaf7b2f0131d31bfde6b3d618813
pdf-font-stream PDF embedded font (sfnt) at offset 0x9426 5292 bytes
font_01_sfnt_off0000a608.bin
c1c67802ab8696c0b4cd108da854f206f821e90a4e35aef4399cb0b13fa8ce30
pdf-font-stream PDF embedded font (sfnt) at offset 0xA608 10720 bytes
font_02_sfnt_off0000caa5.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA5 4324 bytes