Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a6d4a49884835d…

MALICIOUS

PDF

47.0 KB Created: 2020-08-31 03:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81ac5a920347e8dd746d659c67569cf5 SHA-1: 8ef59108c26de8a6a02a305f41df1fbc95ab690e SHA-256: f0a6d4a49884835d4fcc6ff554fa29544f08c2b9935bd06d2d0a3375c25a880e
120 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.com' disguised as a search result for 'glencoe algebra 2 chapter 6 test form 2a answers'. This URL is flagged as a malicious redirector. The document also contains a large number of embedded links, many pointing to 'static.usrfiles.com', which is identified as a PDF link farm. The combination of a malicious redirector and a link farm suggests a phishing or malware distribution attempt.

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/wix?keyword=glencoe+algebra+2+chapter+6+test+form+2a+answers
    • https://static.usrfiles.com/ugd/6df952_3e2c7b3b2b644ea9bad0504f60f6215c.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f39526450b84a16907df117671e9271.pdf
    • https://static.usrfiles.com/ugd/cf14a4_93047992a205499d8db2d235b2eeaef4.pdf
    • https://cdn.shopify.com/s/files/1/0428/8872/4639/files/jirol.pdf
    • https://cdn.shopify.com/s/files/1/0429/0134/0319/files/jomujetekolitadobufofadu.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2056/files/cell_cycle_2020.pdf
    • https://static.usrfiles.com/ugd/b8c837_03469f8f1a1c4133900d943862dac300.pdf
    • https://static.usrfiles.com/ugd/906e9f_62effef967ff48f1a4650458a6490aec.pdf
    • https://static.usrfiles.com/ugd/eb4c03_848dc50ca61748029d0bc977264e79c4.pdf
    • https://cdn.shopify.com/s/files/1/0429/3669/6995/files/consumer_buying_behaviour_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/8795/4073/files/40374604310.pdf
    • https://cdn.shopify.com/s/files/1/0434/6616/2341/files/57506918506.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4577/files/11919185906.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_off00006e4e.bin
80648a13dede18be3b1236c0c9ee4199d324bb809a5f483191851a707aaaff29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4E 5980 bytes
font_01_sfnt_off00008292.bin
ee6902f2941c799b8bb492625ecef537e695c3ecb1045c47dec04be0861ff1f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8292 13780 bytes

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