Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc7c394748620755…

MALICIOUS

PDF

38.7 KB Created: 2020-08-15 02:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1f5edc96f67928d28abd5ad7b593098 SHA-1: 060f280d4a291a36623b8a62166361debaa05588 SHA-256: cc7c394748620755728c2ad267525be23fbed2a18a0e7a7a929e1bd799dfb517
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=oxford+english+teaching+guide+class+7'. This URL is likely used to redirect users to malicious content. The document also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious redirector is sufficient evidence of malicious intent.

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.cc/pify?keyword=oxford+english+teaching+guide+class+7
    • http://files.katherinegaulke.com/uploads/1/3/0/7/130776589/1369963.pdf
    • http://files.thaddeusproduction.com/uploads/1/3/1/1/131164174/luboli-sofezonututu-miwokotorepik-bigolakijejera.pdf
    • http://files.bradfordalliancechurch.com/uploads/1/3/1/4/131453021/011dbfe3a17e47d.pdf
    • http://ginetitaz.culverleygreen.org/uploads/1/3/1/6/131607310/73cac9f51a.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/27660577291.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/super_contra_cheat_code.pdf
    • https://cdn.shopify.com/s/files/1/0427/7751/0055/files/womelesofanenofotadum.pdf
    • https://cdn.shopify.com/s/files/1/0438/3404/8669/files/xezolubejijon.pdf
    • https://cdn.shopify.com/s/files/1/0439/8769/7822/files/story_map_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/5639/7464/files/xivabonoxoxabexaxof.pdf
    • https://cdn.shopify.com/s/files/1/0440/9432/4888/files/dininetoterivaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/savetijatubizuperidevi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/chiaki_fan_club.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0304/files/4135193074.pdf
    • https://cdn.shopify.com/s/files/1/0433/4986/8712/files/34970847380.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_off00004c30.bin
6122a143bb390cd867ab1c97987b66fad1c3ab41b5ce3b0bd55a049374fcd280
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C30 5340 bytes
font_01_sfnt_off00005e5e.bin
08034c68e61113b59b6f4c7aac735b9d5be467fadd0d5e2dfbb275721bf65880
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5E 9764 bytes
font_02_sfnt_off00007fdb.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDB 4324 bytes