Malicious PDF — malware analysis report

Static analysis result for SHA-256 db51d59957c8f9f3…

MALICIOUS

PDF

46.8 KB Created: 2020-08-07 02:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 686cce7b84a23d3eb853c3885c8a2c6f SHA-1: 795a764c5f681145a58660ef38cb406e111711c7 SHA-256: db51d59957c8f9f3118385a84ff7e691e6a2caf2d32817111f95824b871adb1d
160 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that is also present in the PDF's link farm. The presence of a password archive lure suggests that the PDF itself may be a decoy to facilitate the download of a password-protected malicious archive.

Heuristics 4

  • 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.
  • 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.ru/pify?keyword=quimica+inorganica+atkins+4+edicion+pdf
    • http://files.americanautoairspecials.com/uploads/1/3/1/1/131164520/kapozamilixema_rogomitezop_pejulakun.pdf
    • http://fupubi.donaldshoney.com/uploads/1/3/1/4/131437657/kegosedikow.pdf
    • http://files.lollipopranch.net/uploads/1/3/1/1/131164081/bakesolutovunaf.pdf
    • http://files.journey-woman2015.com/uploads/1/3/1/6/131606133/d1f66a0ebc17f7f.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/dymo_labelwriter_400_turbo.pdf
    • https://cdn.shopify.com/s/files/1/0439/0957/8904/files/life_death_and_meaning_david_benatar.pdf
    • https://cdn.shopify.com/s/files/1/0435/9746/3714/files/kidobupupafologasojinar.pdf
    • https://cdn.shopify.com/s/files/1/0431/2770/1655/files/38317999184.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/webomobituwisumepepaxifi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/22927368929.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53940500656.pdf
    • https://cdn.shopify.com/s/files/1/0440/7354/9974/files/52888067025.pdf
    • https://cdn.shopify.com/s/files/1/0434/4292/9821/files/58867318097.pdf
    • https://cdn.shopify.com/s/files/1/0433/4505/1797/files/politique_sociale_dfinition.pdf
    • https://cdn.shopify.com/s/files/1/0431/5090/1402/files/59436027794.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/dijopupadani.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_off000068f8.bin
beaa9632867dc24cb734eb2b8031e77e757f41251b36b783c324823696e7034f
pdf-font-stream PDF embedded font (sfnt) at offset 0x68F8 5540 bytes
font_01_sfnt_off00007bbe.bin
77965f95423677d7a39356ecceaed4049b21020b135105b1e079667396425dfb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBE 10472 bytes
font_02_sfnt_off00009f5a.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F5A 4324 bytes