Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c4b26bfa63357a0…

MALICIOUS

PDF

41.3 KB Created: 2020-07-29 15:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba5a428594378083526efac678ba666c SHA-1: 52238f5de119fe974276f714fcfbe90e313e07f6 SHA-256: 8c4b26bfa63357a057f191d22dd808bc15ecb9c90da5a28596ca6ca79b97dcc9
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is likely used to direct users to a malicious site. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, suggesting an attempt to obscure the true malicious destination. The ML classifier also strongly indicates maliciousness.

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=ccna+wireless+official+exam+certification+guide+pdf
    • http://files.casey-lab.com/uploads/1/3/1/0/131069875/2999992.pdf
    • http://files.trinitychapelwv.org/uploads/1/3/0/7/130775922/7691296.pdf
    • http://files.shopgroveonline.com/uploads/1/3/1/4/131452750/pudexaziga.pdf
    • http://files.texasbrowndog.com/uploads/1/3/2/6/132695397/vibudinuzu-pesilenujudufi.pdf
    • http://files.texasbrowndog.com/uploads/1
    • https://cdn.shopify.com/s/files/1/0429/1421/8151/files/35585641251.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/vijozigavolaluv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6030/5825/files/27284911554.pdf
    • https://cdn.shopify.com/s/files/1/0438/6645/6224/files/fipugiwajubuwatiwatumulip.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/reziwekami.pdf
    • https://cdn.shopify.com/s/files/1/0437/0418/9096/files/sivusasike.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/20482043818.pdf
    • https://cdn.shopify.com/s/files/1/0436/4389/5958/files/97237533428.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8128296882.pdf
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/tarifenezefamapalowirazo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3628/6877/files/fologukutojuw.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_off00006172.bin
18640959b3902fa22e90e8c2cb3352001db50de7ceec0baf1a3dbd9ecf71ec3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6172 5540 bytes
font_01_sfnt_off0000743e.bin
a68f10e2d80c9aedaa792da64a2047499b1be8255d5d04a3f9ba35f12974f25b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x743E 10420 bytes

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