Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf681dca4b188aab…

MALICIOUS

PDF

62.9 KB Created: 2020-08-22 11:18:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8d599ff8c3283f958a1b3eadd9f2fa2 SHA-1: ca157340271c6838207a828aaae7f2cd4f5a7e7b SHA-256: cf681dca4b188aab8d4f22e7bac445bbcf72110748a6fcaebfb75ca4f78851e2
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.003 Windows Command Shell T1204.002 Malicious Link

The PDF contains a malicious redirector link pointing to a URL designed to mimic a Facebook login page, indicating a credential harvesting attempt. The document also instructs the user to interact with command-line interfaces, suggesting a multi-stage attack. Furthermore, it mentions password instructions for an archive, a common tactic to bypass gateway security.

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=facebook+login+android+get+email
    • http://pinuz.tsidieselworxparts.com/uploads/1/3/1/3/131379246/tugasafekuzun-widonir-fetinumata-buxozoj.pdf
    • http://files.taciturnforsale.com/uploads/1/3/1/4/131453401/ba8f1b2be920a.pdf
    • http://files.mrsbscusd.com/uploads/1/3/1/4/131407155/zonutidigobi.pdf
    • http://files.janelleevelyn.com/uploads/1/3/0/7/130776220/81bb52727c3f.pdf
    • http://files.robbiesadventures.com/uploads/1/3/1/8/131871970/liwiga.pdf
    • https://cdn.shopify.com/s/files/1/0428/2325/4179/files/63053831652.pdf
    • https://cdn.shopify.com/s/files/1/0452/7416/9505/files/alimentos_acidos_alcalinos.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/21723543023.pdf
    • https://cdn.shopify.com/s/files/1/0436/3550/7358/files/dimuwedavarerokowepev.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/26517035361.pdf
    • https://cdn.shopify.com/s/files/1/0448/1833/3858/files/lisan_ul_quran_guide_in_malayalam_4.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8007882555.pdf
    • https://cdn.shopify.com/s/files/1/0434/1350/4156/files/kaluvijavusanamaz.pdf
    • https://cdn.shopify.com/s/files/1/0454/4820/0342/files/skyrim_creation_kit_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/7612/2779/files/star_trek_torrent.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_off0000ac99.bin
3234d7d94071176c31d23d21323ef0b071b9c8c5bdd16fbb4dfcf7b5833913cf
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC99 5240 bytes
font_01_sfnt_off0000be4d.bin
268660e933ee2c26b7e9de18e8ad4511d965b4cd517276b6d4000d7b5f04d7ba
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE4D 15776 bytes