Malicious PDF — malware analysis report

Static analysis result for SHA-256 42c5dfc636b4c5ae…

MALICIOUS

PDF

43.7 KB Created: 2020-08-04 17:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b0dddc6121f85debedb30c8f41194ed SHA-1: a0ace5134b4196e2e9966b623226ecf6e04e2bcc SHA-256: 42c5dfc636b4c5aec9488a3909d3c507201a87b618265e287ec9276888924337
120 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=describing+people+s+appearance+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which are hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL and other embedded URLs, reinforcing the malicious intent.

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=describing+people+s+appearance+pdf
    • http://files.camberleyguestaccommodation.com/uploads/1/3/1/6/131607683/1e84be9.pdf
    • http://files.enseaadvisory.com/uploads/1/3/1/4/131453989/3407623.pdf
    • http://files.absintheaccessories.org/uploads/1/3/0/7/130739826/3b851e6543.pdf
    • https://cdn.shopify.com/s/files/1/0437/5052/3029/files/biblia_catolica_para_jovenes_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0428/7063/6710/files/moxevukon.pdf
    • https://cdn.shopify.com/s/files/1/0429/5943/7975/files/22673364575.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/65363172265.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3967/files/38084187714.pdf
    • https://cdn.shopify.com/s/files/1/0437/0654/8377/files/ds2_twinkling_titanite.pdf
    • https://cdn.shopify.com/s/files/1/0431/6682/6656/files/pezerob.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/sonny_ericsson_w580i.pdf
    • https://cdn.shopify.com/s/files/1/0450/4154/9462/files/direct_selling_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0431/1551/1964/files/wejumajizogarox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99913566500.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/morse_code_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/57942778550.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_off00005fa1.bin
392224d2062f330a9550d7fa8f5d797d394e620b27ac9c3bcea7d8d5fb555255
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA1 5168 bytes
font_01_sfnt_off0000712a.bin
7559f497e3019cc0027ab074d3ed3a5dfbf942d9df4b246a588436e5ffc4b8d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x712A 10136 bytes
font_02_sfnt_off000093e9.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x93E9 4324 bytes