Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7702e83b76fb333…

MALICIOUS

PDF

38.6 KB Created: 2020-08-15 10:09:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4984281a2a995062aae23a520c2dab51 SHA-1: 3093bc7bd5830458d4e08d1697549f6a601694cf SHA-256: a7702e83b76fb3330b2a396bee9c0752e9c025e785d8222f94a73a84bb2b66e5
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, disguised as a service manual download. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm or SEO poisoning attempt to drive traffic to malicious sites. The primary malicious IOC is the redirector URL.

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=honda%20astrea%20grand%20service%20manual%20pdf
    • http://files.bafwv.org/uploads/1/3/2/6/132681660/latuxesi.pdf
    • http://files.rare-prints.com/uploads/1/3/1/3/131383456/5926186.pdf
    • http://files.oxfordcountyanimalrescue.com/uploads/1/3/2/7/132710601/1263078.pdf
    • https://cdn.shopify.com/s/files/1/0431/7400/2848/files/wutuwolebuluwe.pdf
    • https://cdn.shopify.com/s/files/1/0440/5621/5702/files/tools_of_data_analysis_in_research.pdf
    • https://cdn.shopify.com/s/files/1/0428/3986/7559/files/2526500630.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/gelaxakakodu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1080/8217/files/60581021505.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/radial_nerve_examination.pdf
    • https://cdn.shopify.com/s/files/1/0434/7507/5225/files/prioritization_delegation_and_assignment_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/6764/5852/files/fakamazanexodawe.pdf
    • https://cdn.shopify.com/s/files/1/0435/0902/2886/files/ziwat.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8629/files/towebomoxorafem.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74808095599.pdf
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/larivituzunotifazi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dekafarisajanitid.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_off00004c46.bin
ac66ddecb1889e99694234647e4a1e19b6174440e696c9ee44c6cb9711419273
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C46 3312 bytes
font_01_sfnt_off00005827.bin
f8f6eb009a013ab99f903c665b492f0516f1fade90716404c9895a92f07294d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5827 5496 bytes
font_02_sfnt_off00006aca.bin
cba5cad91c0a87fb2822db35051a984cf1f6abcfaf5aece0b77ef01844b3aef8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACA 9988 bytes