Malicious PDF — malware analysis report

Static analysis result for SHA-256 22e40cb1838b3123…

MALICIOUS

PDF

35.4 KB Created: 2020-08-10 14:39:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 615d3f5f31ff2e9d182a4cf35b82dea4 SHA-1: 3821a5f5e9f90de35f447784070adc8b6d0459ac SHA-256: 22e40cb1838b31233b7c11fdf69014848efc444c9e29a4c011e49ff7e8c43482
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is presented to the user as a 'Distress tolerance checklist pdf'. This redirector likely serves as a gateway to further malicious content or phishing pages. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the payload.

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/pify?keyword=distress+tolerance+checklist+pdf
    • http://zugapu.beechinorchiropractic.com/uploads/1/3/1/6/131637257/nitoxutidamogut_matogizup_wokusudumuwi_purirutaveb.pdf
    • http://wovataruk.naturalnat.com.au/uploads/1/3/1/6/131636612/ea8941d7cb0.pdf
    • http://lafufef.imaginealltheart.com/uploads/1/3/2/3/132303195/ritefidewod.pdf
    • http://files.flysamba.com/uploads/1/3/0/7/130738821/df416ee.pdf
    • https://cdn.shopify.com/s/files/1/0440/3304/8741/files/abraham_maslow_theory_of_need.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5221/files/28262776431.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/xegagemuxufuzip.pdf
    • https://cdn.shopify.com/s/files/1/0440/6666/8694/files/36975950586.pdf
    • https://cdn.shopify.com/s/files/1/0430/9526/1348/files/maweruregi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3397/files/javascript_basic_tutorial_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0452/6043/9713/files/a_primer_for_spatial_econometrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6165/files/quadrajet_carb_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/5226/9717/files/54687078994.pdf
    • https://cdn.shopify.com/s/files/1/0434/3277/1750/files/pexigomikapowudibas.pdf
    • https://cdn.shopify.com/s/files/1/0436/9966/7099/files/jean_baudrillard_consumer_society.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6157/files/lufomikezodavi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2432/6564/files/60109643577.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_off00004da6.bin
fc19ec46e29aa60676fbd58ea7874d51eff9595d19ad33e2f7c33553911a5f67
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DA6 5308 bytes
font_01_sfnt_off00005fa0.bin
dab811f86f46f9b322e1bb73d873d462f10833b0c9f07e75a378536964762872
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA0 9700 bytes