Malicious PDF — malware analysis report

Static analysis result for SHA-256 56337bce13d17314…

MALICIOUS

PDF

51.8 KB Created: 2020-08-08 02:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ced59a7c92466eeef31671d6a06d285 SHA-1: fcbfaad9c65ba38d1efd9cd1eed9aa10d3f667f7 SHA-256: 56337bce13d17314c949d697ec43bf152096eaed4cc5317a70ce75c739655af5
150 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, ttraff.com. The document body, though heavily obfuscated, contains references to 'circle theorems pdf worksheet' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous external PDF links, many pointing to Shopify, further indicates a link farm or SEO manipulation tactic to drive traffic to malicious content.

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=circle+theorems+pdf+worksheet
    • http://files.shrewdtrading.com/uploads/1/3/0/7/130776536/2008919.pdf
    • http://files.paulsfranchiseleague.com/uploads/1/3/1/4/131438249/kabuvoxije_kuvorenuzixuw_raxejusub.pdf
    • http://files.thewomenslockerroomfoundation.org/uploads/1/3/0/7/130738806/1329716.pdf
    • http://files.bellacalore.com/uploads/1/3/0/8/130814279/mumubimogamu-fupedevumebat-ropetiwajo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6867/files/57353305741.pdf
    • https://cdn.shopify.com/s/files/1/0427/6027/4087/files/90918030380.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/14147297433.pdf
    • https://cdn.shopify.com/s/files/1/0429/6582/7747/files/natalie_portman_rap.pdf
    • https://cdn.shopify.com/s/files/1/0435/7881/8715/files/kimekafexes.pdf
    • https://cdn.shopify.com/s/files/1/0431/5086/8646/files/guval.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/45360364014.pdf
    • https://cdn.shopify.com/s/files/1/0437/5016/2581/files/tubovumokijopaduje.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/43120876262.pdf
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/25327595392.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_off000084ef.bin
3858d540190bb40bc5679344b53d5b6f5445e3fa239886923087d50f4c2189f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84EF 5248 bytes
font_01_sfnt_off000096af.bin
219d92b1771479ec2de08b68fc043993c34b659381ad23b5503f5385490bfb2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96AF 14032 bytes

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