Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fb096dfcd8bd921…

MALICIOUS

PDF

43.1 KB Created: 2020-08-30 03:41:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b8cb774c1fb427a10752a672caeef8a SHA-1: 0196912ae27761fbe5671636078b75ed409fd07f SHA-256: 3fb096dfcd8bd92196aed40439003312ed4fbfd88f0a84976e4123f7f419ef2a
120 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This indicates the primary purpose is to redirect the user to a potentially harmful site, likely for phishing or malware delivery. No scripts were extracted, limiting further analysis of the payload.

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/wix?keyword=%25D1%2581%25D0%25BE%25D1%2587%25D0%25B8%25D0%25BD%25D0%25B5%25D0%25BD%25D0%25B8%25D0%25B5+%25D0%25B5%25D0%25B3%25D1%258D+%25D1%2586%25D1%258B%25D0%25B1%25D1%2583%25D0%25BB%25D1%258C%25D0%25BA%25D0%25BE+2017+29+%25D0%25B2%25D0%25B0%25D1%2580%25D0%25B8%25D0%25B0
    • https://static.usrfiles.com/ugd/b8c837_d960f1f71f894325888f121507b199c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_1952d86bb04c49bdba0097c72be3f467.pdf
    • https://static.usrfiles.com/ugd/b0b521_95f3f149a57246df9821fed95f9fcd67.pdf
    • https://static.usrfiles.com/ugd/43d598_64459a741bd741babab55707ce5eb06f.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ff9788c1ca747e0bfb57631ec50b7d4.pdf
    • https://static.usrfiles.com/ugd/9219f8_dbb94a61778c4713a7d25ef40bce9428.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/3000/files/definition_of_balance_score_card.pdf
    • https://cdn.shopify.com/s/files/1/0437/4049/6033/files/blockman_go_hack_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/33103196892.pdf
    • https://cdn.shopify.com/s/files/1/0454/6166/7992/files/balance_ball_computer_game.pdf
    • https://cdn.shopify.com/s/files/1/0437/9390/7869/files/air_pollution_control_equipment_calculations_louis_theodore.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58014629257.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/23511822113.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_off00005aa5.bin
45232027bfec5d866ec7787b74f218d37b5dff603afa621fce531ac8e16eb413		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA5 6568 bytes
font_01_sfnt_off00007016.bin
eaa687e20859fc133c6c1eae84e4405bdbc58662089e175fe3bf64137dc29860		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7016 14072 bytes

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