Malicious PDF — malware analysis report

Static analysis result for SHA-256 c31aaa5b41809e3b…

MALICIOUS

PDF

42.1 KB Created: 2020-08-31 04:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e41030c32827f7d694bad113290a6c4 SHA-1: 0e6b34d7a5ffb648fa116b7dad464626ec040c3a SHA-256: c31aaa5b41809e3b65aa2bae51bc5de75edfa8bc7a30a057699b1a491559f841
120 Risk Score

Malware Insights

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

The PDF document was identified as malicious due to its extensive use of external links, a technique often employed for SEO manipulation or to redirect users to malicious sites. The primary malicious URL identified is https://ttraff.ru/wix?keyword=plantas+suculentas+tipos, which is flagged as a known malicious redirector. The document body contains garbled text and a repetition of the malicious URL and other benign-looking PDF links, suggesting a content-generation process for link farming.

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=plantas+suculentas+tipos
    • https://cdn.shopify.com/s/files/1/0458/1434/9990/files/banjara_video_song_hd.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/define_the_term_socialization.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/st_augustine_confessions_chadwick.pdf
    • https://static.usrfiles.com/ugd/8acad3_fc2536955c3a49d18f930fe56d4e29be.pdf
    • https://cdn.shopify.com/s/files/1/0436/5172/7513/files/morfologi_caesalpinia_pulcherrima.pdf
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/zonatawelisigodazosebisuf.pdf
    • https://static.usrfiles.com/ugd/99afdc_66927c46fa3841259d650543c3a526db.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9164efb46d5406fb378750e86610c5d.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b4078be1ad94920a9a9c9a07c1541c3.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_907cfea3873742348b9fd34217906d64.pdf
    • https://static.usrfiles.com/ugd/c7a620_a0435023cb854978b423e462b1f5951f.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_off0000682c.bin
b19a5d86974201024411471fd5c508b9d7481ff8ecaa9f541e84bc71a1a763c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x682C 4832 bytes
font_01_sfnt_off000078a4.bin
e0a016272e9f9140f80bb5bae32e60db8bf3bfe05d2a833b77c936bb996b5a0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A4 10496 bytes

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