Malicious PDF — malware analysis report

Static analysis result for SHA-256 c737328ad5fa7b1d…

MALICIOUS

PDF

60.1 KB Created: 2020-08-02 20:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d108895bd321ab04732f03e5301c3fc SHA-1: e41553c8c96f2d7ff9b359edcc1a3d7771c09290 SHA-256: c737328ad5fa7b1d06bf3b76d0e1d0db3026d3c2c33c7cdbb2d8bef3ac21a1de
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a PDF redirector link pointing to ttraff.ru. Additionally, a critical heuristic detected a large PDF link farm, with many links pointing to cdn.shopify.com. The document body contains the URL https://ttraff.ru/pify?keyword=embraer+rj145+amazon, which is likely part of a phishing or SEO poisoning campaign to lure users to malicious content.

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.ru/pify?keyword=embraer+rj145+amazon
    • http://files.littletweetheart.com/uploads/1/3/1/0/131070469/zesazebixatigorezon.pdf
    • http://files.usaexpressions.com/uploads/1/3/2/6/132695636/sanodovekebaxa.pdf
    • http://files.rimatlanta.org/uploads/1/3/1/8/131872105/3955181.pdf
    • http://files.delissimobuntingford.co.uk/uploads/1/3/1/0/131070051/barozisixivuzeg.pdf
    • https://cdn.shopify.com/s/files/1/0440/8400/2981/files/46345993841.pdf
    • https://cdn.shopify.com/s/files/1/0440/5529/8213/files/56402939178.pdf
    • https://cdn.shopify.com/s/files/1/0436/4202/8182/files/51172278853.pdf
    • https://cdn.shopify.com/s/files/1/0436/5382/4677/files/53381817980.pdf
    • https://cdn.shopify.com/s/files/1/0430/3880/2073/files/44567187524.pdf
    • https://cdn.shopify.com/s/files/1/0428/6749/0972/files/windows_8._1_update_stuck.pdf
    • https://cdn.shopify.com/s/files/1/0435/1537/9866/files/23982493911.pdf
    • https://cdn.shopify.com/s/files/1/0432/4933/6483/files/games_similar_to_sims.pdf
    • https://cdn.shopify.com/s/files/1/0438/1373/2512/files/59223611009.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/foluxuworufoginedasipo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9648/2727/files/splatoon_2_pc.pdf
    • https://cdn.shopify.com/s/files/1/0429/8178/5753/files/63405313756.pdf
    • https://cdn.shopify.com/s/files/1/0431/6089/5650/files/kokoziwopifibo.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_off0000a299.bin
f552fb37b4e4ee336fdf659fe4a791b746a5c772b6b394417b6273e98c2c5116		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA299 5108 bytes
font_01_sfnt_off0000b3fa.bin
bbd90c066506b38205a05fd6661fedd6fba71458c710e4ba17a3e81504185cda		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3FA 14604 bytes

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