Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea6b87b90e618f09…

MALICIOUS

PDF

42.1 KB Created: 2020-08-03 14:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 414525443ad318ac685f953c63150a1a SHA-1: 2f3e4eef3dfe0887a0713e4b44b8357305f83b89 SHA-256: ea6b87b90e618f09b39c781b35d1ecdc44d2939f96cb217ddd5555f7dfb7035f
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farm abuse. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', disguised as a chemistry formula sheet. This suggests the document's primary purpose is to redirect users to malicious infrastructure.

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=sat+chemistry+formula+sheet+pdf
    • http://files.wantirnamallpodiatry.com/uploads/1/3/1/3/131379014/liduwijurigezuselom.pdf
    • http://files.nicolloabe.com/uploads/1/3/1/4/131438313/6152238.pdf
    • http://files.rootdown-riseup.org/uploads/1/3/1/8/131871705/memuporutowul_mapabileduf_gexuse_bulapowenolovor.pdf
    • https://cdn.shopify.com/s/files/1/0430/5181/0969/files/duzatakesis.pdf
    • https://cdn.shopify.com/s/files/1/0431/2799/6565/files/vogosabesaxepiduwele.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60801944673.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/google_map_add_markers.pdf
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/8120314250.pdf
    • https://cdn.shopify.com/s/files/1/0427/9664/6556/files/javascript_sort_array_of_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/lisarufexufukulasisi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/92257478169.pdf
    • https://cdn.shopify.com/s/files/1/0434/6698/1542/files/pubexopajikixerijiwonaba.pdf
    • https://cdn.shopify.com/s/files/1/0432/7309/3288/files/8438532356.pdf
    • https://cdn.shopify.com/s/files/1/0435/0581/1608/files/buguguxovovugosaxef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/walezilufotalenuzodumis.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_off0000649c.bin
a9c7c22a2e674952be2d5b83843cd396439787ed7a2f676828b299e546804924		 pdf-font-stream PDF embedded font (sfnt) at offset 0x649C 5600 bytes
font_01_sfnt_off00007784.bin
a764f4d6e4194e0fc2df084b4367b8e5f5ec01d9f3d38e413202b1039070e512		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7784 10404 bytes

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