Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a6b681390658a7…

MALICIOUS

PDF

35.5 KB Created: 2020-08-29 09:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64c760f343fcca6114e95a6abaec7bdb SHA-1: 38ca8ee03b4974fa10bb4fdcc4dd0213c3e0d488 SHA-256: f4a6b681390658a7d157677080cb51cbea51d099b22b1ab57f2e6f4ccdee7be9
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding a large number of external URLs. One of these URLs, 'https://ttraff.ru/wix?keyword=agnus+dei+chords+pdf', is identified as a malicious redirector. The primary purpose appears to be directing users to potentially harmful content through this extensive network of links.

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/wix?keyword=agnus+dei+chords+pdf
    • https://static.usrfiles.com/ugd/b8c837_05ccfb6f509347ac986093d5b86f1f3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_da91eb6cea424e249b9b5cf871653045.pdf
    • https://static.usrfiles.com/ugd/b8c837_eaf3340ce393431a8cf9bcce220e30dd.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/pigaweloxirobavuvonisonob.pdf
    • https://cdn.shopify.com/s/files/1/0431/3487/7847/files/kujivawexenijoritilowezus.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6967/files/figotigitenupojulopulaben.pdf
    • https://cdn.shopify.com/s/files/1/0433/8758/4661/files/kobubesuruwogivi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/reported_speech_backshift.pdf
    • https://cdn.shopify.com/s/files/1/0440/7679/4006/files/counter_offer_letter_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/6850/5766/files/wukizenomomurezakiwar.pdf
    • https://cdn.shopify.com/s/files/1/0434/4414/2245/files/pamitil.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/how_to_make_a_suspicious_looking_eye.pdf
    • https://cdn.shopify.com/s/files/1/0428/7827/1651/files/warijavujokenidozule.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_off00004592.bin
05617815850ff96743d6f8a84a117577b9594254e5e003bd8d4936811bd2cd62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4592 5164 bytes
font_01_sfnt_off00005721.bin
267f861b2f42137eacb4d86a59edf1a89fdf47a4678ad10f2c73f4e1bfff8ab2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5721 13704 bytes

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