Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6fb7b5ef4a974bb…

MALICIOUS

PDF

43.2 KB Created: 2020-08-14 23:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: befc431c8b222962875c455840fb928c SHA-1: 039af70d759124cf22c6009780fb01f010440f02 SHA-256: a6fb7b5ef4a974bbb3012fdd23cd5b223e235c2011c4fdccf31f5d4c9e296a78
150 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, specifically pointing to 'ttraff.com' with a keyword related to Android TV box APKs. It also exhibits a PDF link farm behavior, with numerous links hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary attack pattern involves luring users through a deceptive document body and redirecting them to malicious infrastructure.

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.com/pify?keyword=android+tv+box+apk+malaysia
    • http://files.stbleagues.com/uploads/1/3/0/7/130776489/5f68fabd.pdf
    • https://cdn.shopify.com/s/files/1/0430/4112/8601/files/88217894536.pdf
    • https://cdn.shopify.com/s/files/1/0431/2953/6668/files/ribazuxatominejefujumaru.pdf
    • https://cdn.shopify.com/s/files/1/0429/8237/5577/files/jonibuleribib.pdf
    • https://cdn.shopify.com/s/files/1/0435/4165/9797/files/bcom_1st_year_books_in_english_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/3955/4727/files/5835013900.pdf
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/56135862203.pdf
    • https://cdn.shopify.com/s/files/1/0440/1712/3486/files/pumuwexaxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54748680829.pdf
    • https://cdn.shopify.com/s/files/1/0437/4547/6762/files/criminal_justice_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0723/7531/files/oxford_english_to_bangla_dictionary_apps.pdf
    • https://cdn.shopify.com/s/files/1/0434/0301/8392/files/jidewope.pdf
    • https://cdn.shopify.com/s/files/1/0432/8597/1110/files/pujegenujirojujamekajowat.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/310592814.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_off00006a77.bin
b573cb089b01801234170b20f28ff316e35919c44e7914053cbbf4b3afb6435b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A77 5528 bytes
font_01_sfnt_off00007d2f.bin
be287ddd90fca7b57381ac3d897ac18688b2d04c013b1413248dec5ad851d4b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2F 10104 bytes

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