Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf4320171d893c0f…

MALICIOUS

PDF

43.7 KB Created: 2020-08-18 23:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 788d79591ea138cd88fa98d9a923a7eb SHA-1: aef760d08908f86871d9e5dff9cd5e135c4677c3 SHA-256: cf4320171d893c0f204ee1ce4352e5eb16c1b2a2e79a339627277b69b7ab3a7f
128 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with multiple links pointing to Shopify domains and one critical link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the URL for the malicious redirector. This suggests the document's primary purpose is to trick the user into clicking the link, likely leading to a malicious download or further compromise.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=engagement+party+program+template
    • http://files.graceinwellsville.com/uploads/1/3/0/7/130775666/savomujadewufasexo.pdf
    • http://files.ringettegoalies.com/uploads/1/3/1/1/131164573/310de42a46f.pdf
    • http://tanumi.antiquesdiary.com/uploads/1/3/1/3/131379552/jifusizu.pdf
    • http://tanumi.an
    • https://cdn.shopify.com/s/files/1/0429/1208/8231/files/29449644191.pdf
    • https://cdn.shopify.com/s/files/1/0428/8407/1583/files/mamawonoxozafogema.pdf
    • https://cdn.shopify.com/s/files/1/0432/1204/6495/files/tomoe_butterfly_valve_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0431/7184/0161/files/kevuzabolapalanemu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5382/6726/files/83376218220.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3801/files/zapofenisumararenerega.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/48831731410.pdf
    • https://cdn.shopify.com/s/files/1/0437/7129/7943/files/wikewu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/cat_s_cradle_game.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_off00006651.bin
28fb17803e1f8044f72403ce7021db47cda793140415ec8f9271371a63be9aef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6651 5020 bytes
font_01_sfnt_off0000775c.bin
89a10cc8611e188186b70fd3e2b118f2c8aec4ef918e3d059a49fc7b59d30aa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x775C 13424 bytes

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