Malicious PDF — malware analysis report

Static analysis result for SHA-256 4779a396250ce60e…

MALICIOUS

PDF

45.5 KB Created: 2020-08-19 12:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9841af93124b0400eb187e053b2bbb1a SHA-1: 4f17fe221c30ef56fbb9235284f0e2237d135f4f SHA-256: 4779a396250ce60e05bd330e55a850aaaebe5f356e47c9b3d5b81ca33c4d0664
150 Risk Score

Malware Insights

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

The PDF document contains a lure promising game cheats, which is a common social engineering tactic. It embeds multiple links, with one identified as a malicious redirector pointing to 'https://ttraff.cc/pify?keyword=cheat+gta+vice+city+apk'. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated, but the presence of the malicious redirector and the link farm heuristic are sufficient to assess the attack pattern.

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=cheat+gta+vice+city+apk
    • http://files.open-insurrection.com/uploads/1/3/1/6/131607374/banagumitowoted.pdf
    • https://cdn.shopify.com/s/files/1/0430/4237/3785/files/nodunarapilogumoliwiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/0378/8959/files/sofirisetoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/pozala.pdf
    • https://cdn.shopify.com/s/files/1/0433/6726/8517/files/47324264014.pdf
    • https://cdn.shopify.com/s/files/1/0436/8531/4715/files/icp_discography_kickass.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6568/files/rozik.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/44947650670.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/40727402292.pdf
    • https://cdn.shopify.com/s/files/1/0434/4266/7676/files/bajovalubim.pdf
    • https://cdn.shopify.com/s/files/1/0448/0850/3456/files/catalogo_de_cuentas_de_un_hotel.pdf
    • https://cdn.shopify.com/s/files/1/0433/3800/6686/files/28115621423.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0861/files/galileo_telescope_instruction_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/6062/5557/files/64946534739.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/mumevuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/1773/2249/files/44333458555.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_off000066ed.bin
bf04366fbe7f3b7c112069da4954dc5ca9d2c66ee6ccdbdc90708f5431e4c48e
pdf-font-stream PDF embedded font (sfnt) at offset 0x66ED 4712 bytes
font_01_sfnt_off00007719.bin
be7e4926265d85c226680a77acaa78845c0c4fc164f866aa019882175d6b9af3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7719 10560 bytes
font_02_sfnt_off00009af2.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF2 4324 bytes