Malicious PDF — malware analysis report

Static analysis result for SHA-256 e25186945c077dac…

MALICIOUS

PDF

44.1 KB Created: 2020-08-04 06:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 605195be88ec818f0c45e75ab51e2aa2 SHA-1: 8dfb55964a972c12b7ec3c0dcc03d517045c5db8 SHA-256: e25186945c077dac330cdace7f08db9d27118ac45a3cf57e6e7f6953fca0864f
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text fragments suggesting a lure related to 'English grammar pdf 2'. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the ultimate destination. The primary malicious IOC is the redirector URL, which likely serves to deliver a secondary payload.

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=english+grammar+pdf+2
    • http://files.canadianclubedmonton.com/uploads/1/3/0/7/130739678/wobaki-xunaxo-zuxido.pdf
    • http://files.kingdomhvac.org/uploads/1/3/1/1/131163632/7270828.pdf
    • http://files.julianjrobinson.com/uploads/1/3/0/7/130775645/tisogedutozux-radesitosepobud-voxuzag.pdf
    • http://files.journeystoflavors.com/uploads/1/3/0/9/130969555/a18860d033.pdf
    • https://cdn.shopify.com/s/files/1/0437/5255/4657/files/tapujiku.pdf
    • https://cdn.shopify.com/s/files/1/0435/7334/6465/files/tujewiva.pdf
    • https://cdn.shopify.com/s/files/1/0437/1437/9930/files/movukudimezovukuli.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/dalurutapesufamisarures.pdf
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/polinaponimujibidana.pdf
    • https://cdn.shopify.com/s/files/1/0437/6775/8997/files/wg111_v3_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0437/7581/9927/files/inter_tel_phones_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/8371/7015/files/49563287245.pdf
    • https://cdn.shopify.com/s/files/1/0432/4796/0232/files/cen_rrc_01_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/4192/2982/files/99346974260.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/fokivumepadaxipado.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3565/files/73007191685.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_off00006ddf.bin
3c66eccd75bd4504c06c16bd6829787ce9f489bfdf9e470c12ac39b279fdd370		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDF 5544 bytes
font_01_sfnt_off00008099.bin
17362937be53f4a4dc9ef6b57bf9780207306a96813292628050ff3030427e0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8099 10292 bytes

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