Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9cfff9a357d5769…

MALICIOUS

PDF

46.2 KB Created: 2020-08-20 22:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ada0f7615e2730bbf1b276dd520053b SHA-1: 83bf5b2ae4a5f99a81f0b7232a21d1a221bb8569 SHA-256: c9cfff9a357d5769443d536b739e520ed9eeea7e8802861761707ef16f324aff
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm designed to redirect users. One of the primary links points to a known malicious redirector. The document body itself is largely obfuscated but contains a reference to the malicious URL, suggesting a lure to trick users into clicking the links. The presence of numerous links, many pointing to Shopify domains but also to other unknown domains, indicates an attempt to distribute malicious content through a link farm.

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/pify?keyword=example+of+acknowledgement+for+project+pdf
    • http://files.saracolemft.com/uploads/1/3/0/9/130969809/mejilokekivezar-lelubila-duwakozukun-bawakab.pdf
    • http://files.enigmashetlandponystud.com/uploads/1/3/1/0/131070483/4779006.pdf
    • http://files.12monthbeauty.com/uploads/1/3/0/8/130874128/6301925.pdf
    • http://files.turntoflesh.org/uploads/1/3/1/6/131606174/7979857.pdf
    • https://cdn.shopify.com/s/files/1/0430/1550/4029/files/rasaxujumutifuwurowosuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/software_architecture_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5812/files/55083074536.pdf
    • https://cdn.shopify.com/s/files/1/0437/9954/3970/files/nonabomovonizaki.pdf
    • https://cdn.shopify.com/s/files/1/0430/4922/2298/files/xivamivipurer.pdf
    • https://cdn.shopify.com/s/files/1/0438/3562/1536/files/addition_doubles_worksheet_printable.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/5279965349.pdf
    • https://cdn.shopify.com/s/files/1/0431/4827/9957/files/88540464430.pdf
    • https://cdn.shopify.com/s/files/1/0437/9800/3874/files/xovediminanedori.pdf
    • https://cdn.shopify.com/s/files/1/0432/0700/0219/files/jaruga.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/punafaga.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/jijejivatavaritetuduxibab.pdf
    • https://cdn.shopify.com/s/files/1/0448/3982/9661/files/alejandro_casona_obras.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_off00007639.bin
c01cebf09cad35f1b3cf3c94b72efcedd4e687cad812b172f1ff87dd03af62f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7639 5552 bytes
font_01_sfnt_off00008933.bin
df040e04a29abab5797ed6da6261ccb89bc69d506f54a84210cb3729cac163e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8933 10084 bytes