Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d953a86275d62f…

MALICIOUS

PDF

54.9 KB Created: 2020-08-14 12:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73148e2a6b7d4f3b5b8d23fcc93bf6fc SHA-1: 06774bd26a346b0f7eb0628d6b6841c6f82ff794 SHA-256: f7d953a86275d62f54cd4c49d6781dd317df43c5fbd210a3883ee1e3ce5dccb1
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The primary malicious URL identified is https://ttraff.ru/wb?keyword=all%20my%20loving%20piano%20sheet%20music%20pdf, which is flagged as a malicious redirector. The document body itself is largely unreadable binary data, but the presence of numerous links strongly suggests a phishing or malicious redirection 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.ru/wb?keyword=all%20my%20loving%20piano%20sheet%20music%20pdf
    • http://files.brahmansystems.com/uploads/1/3/1/8/131871614/buxojelelu.pdf
    • http://files.martabrysha.com/uploads/1/3/1/4/131410479/7503276.pdf
    • http://files.sassychicmidland.com/uploads/1/3/1/0/131070561/talilamu_fenowevi_topebasirin_gikapi.pdf
    • http://wutelorus.turkeysnest.com/uploads/1/3/2/7/132712615/wedupod-notegipavavobij.pdf
    • http://files.eaglecrestcheer.com/uploads/1/3/2/6/132682142/af6d2239d.pdf
    • https://cdn.shopify.com/s/files/1/0437/7496/7965/files/guzepurorenadix.pdf
    • https://cdn.shopify.com/s/files/1/0431/8173/6096/files/tofozolug.pdf
    • https://cdn.shopify.com/s/files/1/0428/5700/5215/files/retinifajog.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/40866417523.pdf
    • https://cdn.shopify.com/s/files/1/0443/3071/3244/files/wonderful_christmas_time_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0443/0381/0716/files/el_mapa_del_autoestima.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vibamiwa.pdf
    • https://cdn.shopify.com/s/files/1/0438/6675/1131/files/72360771804.pdf
    • https://cdn.shopify.com/s/files/1/0430/1294/8121/files/75621468432.pdf
    • https://cdn.shopify.com/s/files/1/0438/5911/6182/files/20321047228.pdf
    • https://cdn.shopify.com/s/files/1/0448/3471/7858/files/12362347362.pdf
    • https://cdn.shopify.com/s/files/1/0436/1394/6018/files/soresakum.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_off00008293.bin
9a4c8e36f03c5adfc35b1f8dd99777584eb5981044da0a7781bc9d350043678c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8293 5624 bytes
font_01_sfnt_off000095a0.bin
b830232ec9afb73d4e33354e30e0abbf79b6498cd33d03f241581ba7723e6576
pdf-font-stream PDF embedded font (sfnt) at offset 0x95A0 10356 bytes
font_02_sfnt_off0000b947.bin
5ed570ae14c202d12182337b245ae5fcced705a00a6bf4a302a125516f26af46
pdf-font-stream PDF embedded font (sfnt) at offset 0xB947 16100 bytes