Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cee1ac60f296e8a…

MALICIOUS

PDF

40.5 KB Created: 2020-08-31 06:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b24dd9cc47713dcab1a3b815579d3651 SHA-1: d99b673e4dffc70f4f1219cf152c9a608ce9a8a0 SHA-256: 4cee1ac60f296e8a5db4b5a57704a1108b4ca4ba6ad5587f7fbd495d3278a73f
150 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=como+descargar+mod+spiderman+para+gta+san+andreas+pc'. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to game mods. The presence of numerous other links, many hosted on Shopify but pointing to various PDF files, suggests a link farm or SEO poisoning tactic to drive traffic to the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=como+descargar+mod+spiderman+para+gta+san+andreas+pc
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/10868489531.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0433/files/13474026493.pdf
    • https://cdn.shopify.com/s/files/1/0434/1789/5070/files/android_phone_under_5000_tk_in_bangladesh.pdf
    • https://cdn.shopify.com/s/files/1/0435/4582/1333/files/ipcc_guidelines_waste.pdf
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/56418916.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/dexojigijikemubuvozewu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2581/files/destination_a1_grammar_and_vocabulary.pdf
    • https://cdn.shopify.com/s/files/1/0430/3349/3658/files/wefudi.pdf
    • https://static.usrfiles.com/ugd/a771bd_ad54323b9c024fcfa2ff8a6f94e150e2.pdf
    • https://static.usrfiles.com/ugd/79e5df_a18007e2be0740e8a3218ebf9293005a.pdf
    • https://static.usrfiles.com/ugd/253000_4041dfb3fbb64a8487a23ad798b7e0d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_97016235877e4e29ba89f2d7f9bd7c3f.pdf
    • https://static.usrfiles.com/ugd/b8c837_da4d4ae52d7941bdb4a5f76737f27e19.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_off00005f91.bin
9dd6e09abe02e8813c4a0ce21ff7aa0dac33887cd4e2d9e289d016f6f466cd6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F91 5264 bytes
font_01_sfnt_off0000715e.bin
f9f77421faec084ff367cd1ae37b82ff4fc239d04acc26e38aeeee770c6b30bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x715E 10476 bytes

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