Malicious PDF — malware analysis report

Static analysis result for SHA-256 c49f5001f796c033…

MALICIOUS

PDF

40.4 KB Created: 2020-08-07 19:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c3dc1bcd4aa40588f2a54076b5db3b8 SHA-1: 07346b600d0627b68aeb8eaf38feb7378d336e1c SHA-256: c49f5001f796c0338b4b68fe301e4d7765dcbebe16b2a0b8ace656858068749f
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, containing a large number of embedded URLs. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is likely the primary malicious component. The document body contains garbled text and a reference to the redirector URL, suggesting it's a lure. The presence of numerous Shopify-hosted PDF links, while many are benign, contributes to the overall SEO spamming nature of the document.

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.cc/pify?keyword=funcion+sistema+renina+angiotensina+aldosterona+pdf
    • http://files.ffbdispositions.com/uploads/1/3/1/4/131437626/pigupov-borofub-febewesotuno.pdf
    • http://files.trojerestaurant.com/uploads/1/3/0/7/130775145/vekevelis_lavinebosi.pdf
    • http://files.earthboundvoicesparanormal.net/uploads/1/3/2/6/132681479/japaxok_zivavuzenima.pdf
    • http://files.roaming.studio/uploads/1/3/1/0/131070579/rexomadudame-pesenagavuzexo.pdf
    • http://files.divine-wellness.org/uploads/1/3/1/4/131408899/3783452.pdf
    • https://cdn.shopify.com/s/files/1/0436/6575/2217/files/pdf_to_word_converter_online_free_editable_without_email.pdf
    • https://cdn.shopify.com/s/files/1/0432/2020/5726/files/befamokitowur.pdf
    • https://cdn.shopify.com/s/files/1/0440/9711/0168/files/lao_tzu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5587/files/48958130000.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/tonupulabularari.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2321/files/dopizitetakavo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1924/files/36005377661.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/tiny_7_iso.pdf
    • https://cdn.shopify.com/s/files/1/0439/1315/0632/files/complete_physics_for_cambridge_secondary_1_workbook_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/single_variable_calculus_stewart_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/22387065374.pdf
    • https://cdn.shopify.com/s/files/1/0430/8454/6209/files/96084675099.pdf
    • https://cdn.shopify.com/s/files/1/0437/6467/8807/files/37978521889.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/fudasamof.pdf
    • https://cdn.shopify.com/s/files/1/0439/6145/0654/files/31700825910.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/
    • https://cdn.shopify.com/s/files/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c4d.bin
54b91bd77eabe81e7321e0eb7a06aab0a5d465eee901e30a39b50b367e88fafb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4D 5432 bytes
font_01_sfnt_off00006eb2.bin
2e3e3e7e7e24286f3a5da3f315c57025476d02c42a7eff4ecd5da2cb38153b18
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB2 10852 bytes