Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ef24962684e4bb…

MALICIOUS

PDF

41.4 KB Created: 2020-07-14 11:12:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 793b0a706594bcbd184c6296777b4c19 SHA-1: 6cee4f8d8274c3a2307132560b2a836231c4c200 SHA-256: 37ef24962684e4bbf05d06a29d0c107f1cd98b8294b271680dd244e91215c7ea
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, directing users to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary one pointing to a Shopify domain. The document body, though heavily obfuscated, contains text related to sales discounts, likely serving as a lure.

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.cc/wb?keyword=calculating%20sales%20discounts%20worksheets
    • http://files.dependabullbulldogs.com/uploads/1/3/0/7/130775221/7c983.pdf
    • http://files.communitysolarvalueproject.com/uploads/1/3/2/7/132712302/5771250.pdf
    • http://files.cwwdelta.com/uploads/1/3/1/6/131637163/50e16528845f5.pdf
    • http://files.dependabullbulldogs.com/uploads/1/3/0/7/130775221/7c983
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/dadugawuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/figarawevig.pdf
    • https://cdn.shopify.com/s/files/1/0428/3521/4503/files/vufubofanekefikutevabike.pdf
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/jexelizimawupevafipari.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rirolor.pdf
    • https://bimirofi.files.wordpress.com/2020/06/gutinixibosibovukib.pdf
    • https://kajekum.files.wordpress.com/2020/06/94758147544.pdf
    • https://vowifomijo.files.wordpress.com/2020/07/33016045384.pdf
    • https://cdn.shopify.com/s/files/1/0432/2518/6466/files/11526943382.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/buzigikavoxevasamuje.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/85636265660.pdf
    • https://cdn.shopify.com/s/files/1/0432/4291/3952/files/30556327925.pdf
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/95375100510.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5676577217.pdf
    • https://cdn.shopify.com/s/files/1/0434/5341/5576/files/88560600032.pdf
    • https://cdn.shopify.com/s/files/1/0427/5663/6828/files/7768195592.pdf
    • https://cdn.shopify.com/s/files/1/0434/0681/9493/files/8586494921.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0791/files/13460202737.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000626e.bin
46a1076df80301841788ebcdeec74643fc9c1a094dc1b9647e3a9e6a43881bb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x626E 5260 bytes
font_01_sfnt_off00007459.bin
fe95eb1bfed56004ef4a75525f9f0b8d3b1e04b595da5b2cf1fa580aac176b9f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7459 10520 bytes