Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff6c5c297e469ca5…

MALICIOUS

PDF

57.4 KB Created: 2020-08-08 14:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05cb45ce282e1ac0320ab4ab55245699 SHA-1: b1f498857bae8a3e6a3b452f52a386151ea6b192 SHA-256: ff6c5c297e469ca5ae36a3805cd33b03260d70052a6063d028d30945a51ab047
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a high number of embedded links, many pointing to external PDFs, a technique often used for SEO poisoning or to host malicious content. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is part of a lure for 'business opportunities in nigeria'. The document body, though heavily obfuscated, contains the same URL. The presence of a visual download button further supports a malicious workflow.

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.cc/pify?keyword=business+opportunities+in+nigeria+pdf
    • http://files.hellokels.com/uploads/1/3/0/7/130739344/cbc680.pdf
    • http://files.chan6es.com/uploads/1/3/1/0/131071056/nufiratobuf-vefutijekesazi-mudogu.pdf
    • http://files.arsenicmedia.com/uploads/1/3/1/1/131164440/aa46a0.pdf
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/glossary_of_finance_and_accounting_terms.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/jurnal_descriptive_text.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8248/files/49532001591.pdf
    • https://cdn.shopify.com/s/files/1/0437/6307/3181/files/89271074921.pdf
    • https://cdn.shopify.com/s/files/1/0433/4832/8603/files/figujufizisupuli.pdf
    • https://cdn.shopify.com/s/files/1/0437/9534/9661/files/49_countries_in_asia_and_their_capitals_and_currency.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zupapinited.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6372/files/xelubovafuxasek.pdf
    • https://cdn.shopify.com/s/files/1/0433/7801/6406/files/40482050816.pdf
    • https://cdn.shopify.com/s/files/1/0430/5318/7221/files/hardest_brain_teasers.pdf
    • https://cdn.shopify.com/s/files/1/0435/1816/5146/files/calf_muscle_strain_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/3839/9912/files/82270956990.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6413/files/25398934830.pdf
    • https://cdn.shopify.com/s/files/1/0429/3240/4380/files/nanebuzuxogimasigo.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_off0000a25b.bin
d749a8d2c4bcdc5dd82c019e18cbfadb1c15f53bcc891d33e064c86443723886
pdf-font-stream PDF embedded font (sfnt) at offset 0xA25B 5224 bytes
font_01_sfnt_off0000b436.bin
56b46c0b87e3a835f1c0f05c6ef74d0837b880ad0114c4f8b4319b2ea7e07bea
pdf-font-stream PDF embedded font (sfnt) at offset 0xB436 10628 bytes