Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a290925ecd5e093…

MALICIOUS

PDF

50.1 KB Created: 2020-08-13 01:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 650ff86300ec9793b640684d994b06f3 SHA-1: 27bb0e8c8e293d5a4bf753cbd75e0ad5f87fd345 SHA-256: 4a290925ecd5e0931e563ea8cb0b13ca78465584cf8c2b12145af9550b835353
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains this URL and other embedded URLs, suggesting a lure to external malicious content. The presence of a large number of external PDF links further indicates a link farm or SEO poisoning tactic to distribute malicious content. The primary attack pattern involves tricking users into clicking a malicious link disguised as a relevant document.

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/pify?keyword=lettre+de+motivation+en+anglais+pour+universit%25C3%25A9+pdf
    • http://files.riverwalkadultdayservices.com/uploads/1/3/2/6/132681556/rixoxatuvanun_xerifosotubul_badafurupakum_dexumegapo.pdf
    • http://rajubi.bigsisterschicago.org/uploads/1/3/1/4/131407995/8519192.pdf
    • http://monezanab.emwflorals.com/uploads/1/3/1/4/131438392/8219903.pdf
    • http://files.fortydollarserve.com/uploads/1/3/1/4/131452958/34eec6adbc6e.pdf
    • https://cdn.shopify.com/s/files/1/0435/4146/3189/files/15417504322.pdf
    • https://cdn.shopify.com/s/files/1/0434/3175/5932/files/winuwokotakumojid.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/20581734795.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6261/files/59342381056.pdf
    • https://cdn.shopify.com/s/files/1/0433/1359/4526/files/appendices_in_research_paper.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5460/files/75580589376.pdf
    • https://cdn.shopify.com/s/files/1/0436/1843/5229/files/craftsman_radial_arm_saw_parts.pdf
    • https://cdn.shopify.com/s/files/1/0428/8859/3567/files/diremaxuvabonemami.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/lonely_planet_greece.pdf
    • https://cdn.shopify.com/s/files/1/0433/0497/6548/files/9617580893.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1832/files/29812390750.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0489/files/visijamebipikijizelav.pdf
    • https://cdn.shopify.com/s/files/1/0433/4632/9750/files/21370829823.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8242/files/disuz.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_off00006e2a.bin
2b7a8be378cbe2e717507dbba41483c13910f5aa704819baf4bb6ad95ba71c5a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2A 5388 bytes
font_01_sfnt_off00008028.bin
32bfbb558606d3dd182ea623f67d6e468286ced74134f3ee773ea23a5c026e02
pdf-font-stream PDF embedded font (sfnt) at offset 0x8028 13972 bytes
font_02_sfnt_off0000aa40.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA40 4324 bytes