Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46608bfdbe0e4bb…

MALICIOUS

PDF

39.3 KB Created: 2020-08-24 22:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24de7a7be0467229dcb27bb4209474cc SHA-1: 737dac135a1b95fe28fe8ad2e14949948f4fed91 SHA-256: c46608bfdbe0e4bb9aa7e654135f9c8c91f6d7abcf47daf7494f7708584c62f9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link to 'ttraff.com'. The document body, though partially corrupted, contains text suggesting it is a 'data sheet', which is likely a lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm used for SEO poisoning or to obscure the malicious redirector. The ML classifier strongly flagged this PDF as malicious.

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=data+sheet+international+paint
    • http://files.ucbearcatsfootball.com/uploads/1/3/2/7/132741339/siwidowejanusifotiro.pdf
    • http://lapideb.glenelder.com/uploads/1/3/1/4/131452958/kugiso_zuvaxipuduj.pdf
    • http://files.fpsch.com/uploads/1/3/1/4/131482886/e2fdff944d.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/38102040786.pdf
    • https://cdn.shopify.com/s/files/1/0429/9938/2170/files/sisunik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10588857949.pdf
    • https://cdn.shopify.com/s/files/1/0427/9376/2975/files/daru_peeni_band_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0433/4125/0714/files/energias_alternativas_en_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/roruvajif.pdf
    • https://cdn.shopify.com/s/files/1/0432/6617/9230/files/68605322376.pdf
    • https://cdn.shopify.com/s/files/1/0434/8752/7078/files/48377454612.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1062/files/mulagovajagujovowin.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_off00005207.bin
b2fe58b3337c959b307000967ca1f2722243a72e1ac882a36434c344b2e48de7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5207 4908 bytes
font_01_sfnt_off000062aa.bin
5e18d029f19665b09d1080853612e24754a025d4aab9f63d7803824b5eb29e1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x62AA 14968 bytes