Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ae8f9c1397a7fe…

MALICIOUS

PDF

37.9 KB Created: 2020-08-24 04:05:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9e0a67c9347c0bc14c968b6e6152576 SHA-1: 6d8268f4b6320268dab018a7ce525547f021644a SHA-256: c7ae8f9c1397a7feab35698fc84f679bef547f002b116c290a0093a92ae60824
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to deliver further malicious content. The document body, though heavily obfuscated, contains the target URL and other embedded URLs, suggesting a phishing or social engineering lure. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO poisoning and driving traffic to malicious sites.

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=balance+sheet+in+accounting+ppt
    • http://files.teacherdallas.com/uploads/1/3/0/7/130776327/3257808.pdf
    • http://duwikiv.leanagainstmyheart.com/uploads/1/3/0/8/130873951/wupamizisexe.pdf
    • http://files.kirkmarlenespain.com/uploads/1/3/0/7/130740298/5564514.pdf
    • http://files.gpvaniermusic.com/uploads/1/3/1/0/131070317/doletube.pdf
    • https://cdn.shopify.com/s/files/1/0439/8029/2254/files/sampooran_chaupai_sahib.pdf
    • https://cdn.shopify.com/s/files/1/0434/0416/5276/files/91207932967.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/reliance_company_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0450/4892/2270/files/candomble_de_angola.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/melokozukidorizagonosek.pdf
    • https://cdn.shopify.com/s/files/1/0428/5687/4151/files/wiwomuxedileniwaganidi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/gedevi.pdf
    • https://cdn.shopify.com/s/files/1/0454/4705/3470/files/calligraphy_guide_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5965/files/6268843630.pdf
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/59418968983.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_off0000573d.bin
3c9163ef92bb6955a106cfdf0679c0d0024aa0d5bc7ca91ad4c98aee5a123832		 pdf-font-stream PDF embedded font (sfnt) at offset 0x573D 5148 bytes
font_01_sfnt_off000068b9.bin
c4072a5da574292da9dd2ee584e88729cbbc13a0713220f46da5b8d0d312a27c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68B9 10072 bytes

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