Malicious PDF — malware analysis report

Static analysis result for SHA-256 833d160f097c3f1b…

MALICIOUS

PDF

38.2 KB Created: 2020-07-28 06:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6296d8d9f722624579487f470e31740a SHA-1: ed5e41a7526f98a4c577d84df9f4027ee495ef98 SHA-256: 833d160f097c3f1b040e72cddcc54d9d983b17f464a0455b4dff67d31209a214
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is used in conjunction with a link farm strategy. The document body, though heavily obfuscated, contains text related to 'Aimp player android skins', suggesting a lure to attract users to click on the malicious link. The file also contains numerous links to Shopify-hosted PDFs, likely part of a SEO poisoning or link farm tactic to improve search engine ranking for the malicious lure.

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=aimp+player+android+skins
    • http://files.courtneymmartin.com/uploads/1/3/0/8/130814459/duzuwinolu.pdf
    • http://files.westtexasguitarfestival.com/uploads/1/3/1/8/131856232/2b5164.pdf
    • http://files.thehot-boxcompany.com/uploads/1/3/1/3/131380547/motudo.pdf
    • http://files.opccdoc.org/uploads/1/3/1/1/131164386/b3dd348df4d2127.pdf
    • https://cdn.shopify.com/s/files/1/0433/9492/4700/files/toxeregikozegog.pdf
    • https://cdn.shopify.com/s/files/1/0431/6302/5567/files/rajivolubujobonovenuduvag.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/55689919845.pdf
    • https://cdn.shopify.com/s/files/1/0437/8080/0674/files/zasusovadifigadubejejabim.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/womavujeximonuzara.pdf
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/853682724.pdf
    • https://cdn.shopify.com/s/files/1/0434/5158/0568/files/dulapokesuxigedatixis.pdf
    • https://cdn.shopify.com/s/files/1/0436/2931/4206/files/tirew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zemeletitofugawekabol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdf
    • https://cdn.shopify.com/s/files/1/0432/7895/8758/files/zaxowusasodit.pdf
    • https://cdn.shopify.com/s/files/1/0430/9244/3303/files/34367105657.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/23785373364.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/1/0434/5564/3

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a16.bin
57ee958a73364cc0bc9f80faf734bc9916e31244c2cc19ffbff7fdea88307db4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A16 4968 bytes
font_01_sfnt_off00006ad4.bin
7a46acc0532030b4f409005b9548bcb294872cb7698e38b6500d1eef66cab1e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD4 9572 bytes