Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ac1096c4cbb87af…

MALICIOUS

PDF

38.7 KB Created: 2020-08-05 06:53:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97897104aad2a34532098186751a607b SHA-1: 32d0d27a9959dc95f356deac8c9afcad24fdad8e SHA-256: 3ac1096c4cbb87afd57a9c2bb65146fa20be31c81da8e45122da89088d6d3881
158 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a critical malicious redirector link pointing to ttraff.ru. This link is designed to lure the user to a page that likely hosts further malicious content, disguised as a PDF download. The ML classifier also strongly indicated maliciousness. The document body text, while garbled, contains keywords related to a support group manual, likely a lure to entice clicks on the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=grief+and+loss+support+group+facilitator+s+manual+pdf
    • http://files.edgertonbookfestival.org/uploads/1/3/1/1/131163559/1010284a28.pdf
    • http://mexur.kilimanjarohope.org/uploads/1/3/2/7/132712323/ponesusig-kimuvepo-vojurakofag-luforejunutesi.pdf
    • http://fewivar.johnnysoln.com/uploads/1/3/1/4/131482952/5978983.pdf
    • http://files.hairloungeltd.co.uk/uploads/1/3/1/8/131871571/tuxorobizowi_gipilutepib_wixaxumuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/53286652168.pdf
    • https://cdn.shopify.com/s/files/1/0430/3021/6855/files/delulesevumisikitoleruf.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/75373066573.pdf
    • https://cdn.shopify.com/s/files/1/0434/7179/8424/files/ginivuvafixazemixuti.pdf
    • https://cdn.shopify.com/s/files/1/0433/6913/6284/files/87669098440.pdf
    • https://cdn.shopify.com/s/files/1/0440/7230/4805/files/osrs_f2p_money_making.pdf
    • https://cdn.shopify.com/s/files/1/0437/4301/9159/files/mnemonica_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8333/files/29575361535.pdf
    • https://cdn.shopify.com/s/files/1/0448/4333/5837/files/ankle_sprain_exercises_kaiser.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/before_he_cheats_piano.pdf
    • https://cdn.shopify.com/s/files/1/0440/3832/4374/files/17034492320.pdf
    • https://cdn.shopify.com/s/files/1/0432/0080/7070/files/pmp_braindumps.pdf
    • https://cdn.shopify.com/s/files/1/0435/7029/9038/files/fuvevaxunumonaposobi.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_off00005409.bin
97de8be6124c5a3df7261ddb305eb41f306d3e6e0f880f99c4f24d8783d163f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5409 5508 bytes
font_01_sfnt_off000066b6.bin
64bfa48930b74fac47ec49dde690a7f9f9567eacce97222429b8eabd9a91af3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x66B6 10876 bytes