Malicious PDF — malware analysis report

Static analysis result for SHA-256 9785f7e205de520e…

MALICIOUS

PDF

42.1 KB Created: 2020-08-07 10:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6ed6299a466963a64fbf1e9d9b4a3d9 SHA-1: ffb8426cec7d0d5a1b6eea7f5873159a02848d51 SHA-256: 9785f7e205de520e2790eb17bca6cfb587c785114e44122e3dabbebc20ff1c79
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains hosting PDF files. One prominent link, https://ttraff.cc/pify?keyword=weighted+calisthenics+routine+pdf, is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, and the document body is heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=weighted+calisthenics+routine+pdf
    • http://files.genesiscmty.com/uploads/1/3/2/7/132712324/rojezidisalurigupe.pdf
    • http://files.max-russell.com/uploads/1/3/1/6/131637240/romixixixufever-gizukuwatim-lixisinokaku.pdf
    • http://jiguwe.mrshenryinfirst.com/uploads/1/3/0/7/130739783/18cd848.pdf
    • http://files.krwoodworkings.com/uploads/1/3/0/8/130814078/nuduta.pdf
    • https://cdn.shopify.com/s/files/1/0439/1688/6184/files/nusuxasa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25781613666.pdf
    • https://cdn.shopify.com/s/files/1/0437/7827/7527/files/widitok.pdf
    • https://cdn.shopify.com/s/files/1/0431/6119/0554/files/agile_approach_to_project_management.pdf
    • https://cdn.shopify.com/s/files/1/0432/9183/6566/files/bhagavad_gita_in_sanskrit_with_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0431/9890/6528/files/14337300260.pdf
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/42506817704.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/tour_guide_barbie.pdf
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/synonyms_english_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/5041/8847/files/sefopizok.pdf
    • https://cdn.shopify.com/s/files/1/0434/2651/3048/files/42524412063.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_off00006534.bin
c9f1b46c1995b65c6f9834928ae370d1ee9f78371711b33abfbe20f3bc85b2e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6534 5432 bytes
font_01_sfnt_off000077b7.bin
a10e8e7a41951361079fc4853797dace8d8afc43714288e2aab39af083d12ea1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B7 10468 bytes

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