Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb386525e228607b…

MALICIOUS

PDF

41.5 KB Created: 2020-08-25 16:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47811a082d7dd497c8ab3a954b44e5fd SHA-1: 02d09e5d5df325776770b45a0a86fc1462e669c0 SHA-256: cb386525e228607bd4f0146895e5d9ffeae76d193d6b586b7eb846ba6e09e745
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru' with a keyword related to Android updates. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same URL found in the heuristic firing. This suggests the primary goal is to redirect the user to a malicious site, likely for malware distribution or phishing.

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=android+9+update+bluetooth+issues
    • http://xivovum.triplecrownlacrosse.com/uploads/1/3/1/4/131453558/detax.pdf
    • http://nowewera.thegutguys.com/uploads/1/3/1/4/131453206/pawodisuk.pdf
    • http://vivave.donjitsudodojo.com/uploads/1/3/1/4/131453197/wapixiduvanitigom.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/combat_lifesaver_certificate.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1920/files/kagarenigaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/7260/0726/files/human_anatomy_vol_1_upper_limb_and_thorax.pdf
    • https://cdn.shopify.com/s/files/1/0436/6041/1033/files/probabili_formazioni_sportmediaset_4_giornata.pdf
    • https://cdn.shopify.com/s/files/1/0435/7265/8335/files/jevuxudik.pdf
    • https://cdn.shopify.com/s/files/1/0428/0877/0726/files/rararosanagij.pdf
    • https://cdn.shopify.com/s/files/1/0431/8593/0389/files/basic_guitar_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0438/0403/3181/files/julonebolefu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5360/files/27094873721.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_off00006665.bin
2b5549d4dc7e2050a774fc43b8028a121e18c66e252d362916535e2340e421b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6665 5332 bytes
font_01_sfnt_off00007869.bin
688901e9a03a158f59ea8776219b50c5db129993a7d1f2f225b01565d9400e87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7869 9708 bytes

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