Malicious PDF — malware analysis report

Static analysis result for SHA-256 dff86063bbcdfacc…

MALICIOUS

PDF

42.3 KB Created: 2020-08-15 10:40:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d6ae6c492223f529a2e6b543829c1d6 SHA-1: aa7515cb8fd83be7045cb01cb7e120f06ac03c2c SHA-256: dff86063bbcdfaccf13e0856335c51e39b2e7b418070b0a8fa9aac55cd8d576e
128 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'aicp certification guide' and includes the malicious URL, suggesting a lure to a phishing or malware site. The presence of a link farm further supports the malicious intent.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.ru/pify?keyword=aicp+certification+guide
    • http://files.csd86.com/uploads/1/3/2/6/132681969/joforujinavoba-voripudew-xujabuvumub-tomotijotaj.pdf
    • http://supota.luizaoleszczuk.com/uploads/1/3/1/1/131164250/b2915.pdf
    • http://files.honeyhillsapiary.net/uploads/1/3/1/6/131606490/5b738.pdf
    • http://files.hellogorgeousre.com/uploads/1/3/1/1/131164152/8d73f54757d.pdf
    • http://files.blackdustsculptures.com/uploads/1/3/0/7/130739415/e6cdc66236b6be6.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6285/files/lavasizodazinu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7349/files/raag_bhairavi_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0086/files/gipibunib.pdf
    • https://cdn.shopify.com/s/files/1/0440/6122/9206/files/numidu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/potitejuvuluvupedunudegus.pdf
    • https://cdn.shopify.com/s/files/1/0428/8849/5270/files/jufebiwe.pdf
    • https://cdn.shopify.com/s/files/1/0436/1060/3677/files/lagowo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7548/files/sofinosarasigikoretoduv.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/52612979610.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/chromatic_harmonica_scales.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/60633790716.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_off00005987.bin
7beb0b9895442938f6b3485f3905d17fececf9b7bb99657dd126a67ab20de561
pdf-font-stream PDF embedded font (sfnt) at offset 0x5987 4984 bytes
font_01_sfnt_off00006a78.bin
ab2dc8e9e102101f791444e49f361797770b8cc3d2ff7f396ef2e39daecc9afd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A78 10424 bytes
font_02_sfnt_off00008e0d.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0D 4324 bytes