Malicious PDF — malware analysis report

Static analysis result for SHA-256 b340142499711293…

MALICIOUS

PDF

41.4 KB Created: 2020-09-17 06:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0122374cf4e133227ae5875f0279f6c4 SHA-1: 9543982afc7a7d63b10c4305bd7c6026a9c5f515 SHA-256: b34014249971129363b6c345f751b7e1df02a76c287ca9e512ca2d3486536965
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'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external resources, many hosted on Shopify. The ML classifier strongly flags this PDF as malicious. The primary attack vector appears to be tricking the user into clicking the malicious link by presenting it as relevant 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/wb?keyword=osrs%20the%20digsite%20quest%20guide
    • https://cdn.shopify.com/s/files/1/0437/4937/6149/files/kugekilaleragaputoji.pdf
    • https://cdn.shopify.com/s/files/1/0484/0564/3422/files/welewaxuxib.pdf
    • https://cdn.shopify.com/s/files/1/0437/1061/1607/files/gefalerebodopodubed.pdf
    • https://cdn.shopify.com/s/files/1/0432/4071/8496/files/beyond_the_sea_piano_sheet_music_easy.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/annadata_books_telugu.pdf
    • https://1cdb51a7-055a-4633-9bdd-f175f606f65f.filesusr.com/ugd/45fd81_2d211dc3882f4f2dad3801c87da35594.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0464/5388/3048/files/43352255682.pdf
    • https://cdn.shopify.com/s/files/1/0440/0722/7550/files/irritrol_rd-_600_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/4567/4389/files/mastitis_treatment_guidelines_canada.pdf
    • https://cdn.shopify.com/s/files/1/0433/9531/7918/files/35768631049.pdf
    • https://cdn.shopify.com/s/files/1/0433/7028/3166/files/daigremontiana_kalanchoe_aranto.pdf
    • https://cdn.shopify.com/s/files/1/0438/2225/2189/files/32071174167.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_off000065d4.bin
411e1d0da72aa781c3c766c22feacfcff2c203f8a98c35703242cb31b581cb63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D4 5000 bytes
font_01_sfnt_off000076c2.bin
45b882ddc00788a40f043da08d7ffe878f2ec0805a10089ee7e09a3054321c26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C2 10044 bytes

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