Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ce27b7478369b6…

MALICIOUS

PDF

45.0 KB Created: 2020-08-09 18:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6996fd17e6787c310bad193a4fe14bd3 SHA-1: 16ab6ce8e3057cd769ccc86c52f067b9534db4a3 SHA-256: f7ce27b7478369b6452befddca918071fadeac3eb5a34f8ce3a752ff858a3e53
120 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'exercise routine for weight loss pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The primary malicious IOC is the redirector URL, which likely leads to further 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.com/pify?keyword=exercise+routine+for+weight+loss+pdf
    • http://files.cowgirlastrologer.com/uploads/1/3/1/4/131406893/07146de51.pdf
    • http://files.advancedenergywork.com/uploads/1/3/1/3/131381078/gawafebisosop_vowofi_fifob_vifuruxafak.pdf
    • http://files.lifton.ca/uploads/1/3/1/8/131857152/diler_xavokebiresafoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/8039/1585/files/capillary_electrophoresis_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8165/files/2989935471.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/12281965520.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1149/files/bexudasolegiluk.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7365/files/hernia_de_hiato_tratamento.pdf
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/14263620516.pdf
    • https://cdn.shopify.com/s/files/1/0432/6490/1270/files/68055969861.pdf
    • https://cdn.shopify.com/s/files/1/0432/1558/5448/files/14779330667.pdf
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/78488383433.pdf
    • https://cdn.shopify.com/s/files/1/0435/9425/2456/files/15069358310.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7349/files/angulos_adyacentes_y_opuestos_por_el_vertice_ejercicios.pdf
    • https://cdn.shopify.com/s/files/1/0434/7654/9798/files/53093178336.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/gabiteguzuvagelubixifeno.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006406.bin
8adedae810a3d0a5c7c678b6d510d3e0361d2002c5081811558ed8298f3c0974
pdf-font-stream PDF embedded font (sfnt) at offset 0x6406 5208 bytes
font_01_sfnt_off000075d4.bin
af6dc9281a4fec0b3526db43b8b9c41a8bc829bb01fa0caf8a4996e916d696c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x75D4 10300 bytes
font_02_sfnt_off00009902.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9902 4324 bytes