Malicious PDF — malware analysis report

Static analysis result for SHA-256 3913c42af177403b…

MALICIOUS

PDF

79.6 KB Created: 2020-09-11 18:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71e42717741c16b4a4d96f4cbd93513c SHA-1: 61349514b431413299784e30367062b9eecd6ecc SHA-256: 3913c42af177403b924815f86e85b396218b1b6955321969a8f6b417f2a219b8
176 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a critical finding for a PDF redirector link pointing to 'ttraff.com'. The document also exhibits social engineering tactics ('ClickFix') and a fake invoice lure, aiming to prompt the user to interact with the malicious link. The presence of numerous external PDF links suggests a link farm designed to improve search engine ranking for malicious content. The document body, though heavily obfuscated, contains the malicious URL.

Heuristics 6

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.com/pify?keyword=adobe+acrobat+reader+edit+pdf+file
    • https://static.usrfiles.com/ugd/f9d4cd_4fb86e434ae346c79dd13007cd8cff8d.pdf
    • https://static.usrfiles.com/ugd/8dde66_361e314312b141afa6554133f6b48ac9.pdf
    • https://static.usrfiles.com/ugd/e2b09b_fe81f2d7b60e412299611c5f86845c5a.pdf
    • https://static.usrfiles.com/ugd/5af86b_39fa31dc2e654fcf9f2c7407f2327cec.pdf
    • https://static.usrfiles.com/ugd/e643da_0b2d27c80fcb4515a20c951a9e836bc8.pdf
    • https://static.usrfiles.com/ugd/3f80ec_74a53200ea6c44cbb00a03ba79c0b17a.pdf
    • https://static.usrfiles.com/ugd/e1c37d_898c6acca6334e0789e6f5b244f72e59.pdf
    • https://static.usrfiles.com/ugd/4826f5_44b28442c35749e1a61261eb7cb3523f.pdf
    • https://static.usrfiles.com/ugd/1df9ea_978604269fd24bcbafd44aa8a5791cac.pdf
    • https://static.usrfiles.com/ugd/ef253e_ba32714dfd7b48acb81f4b5d63262aa7.pdf
    • https://static.usrfiles.com/ugd/b926a8_4468c2b3e3824189a66e8421c5109ce2.pdf
    • https://static.usrfiles.com/ugd/837d34_abbcf0c03b434d9f9d4e3e0bed5464cd.pdf
    • https://static.usrfiles.com/ugd/69695d_eb7f6e382ea944c89d87ed983b71932b.pdf
    • https://static.usrfiles.com/ugd/10b11f_557ef9adb0214150a28c22eec9a18ed0.pdf
    • https://static.usrfiles.com/ugd/227d0f_607ff253d7044f47b8a404f7adef84fd.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_off0000fc0e.bin
f9dc37ea5c252fccf8005ec0b3965cbd191f56cb31b3e7efc41eec145326ce1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0E 5100 bytes
font_01_sfnt_off00010d75.bin
448a79681d60a49ffca649cc1be61b25c9960874d18d163113302a0bc53563f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D75 10476 bytes

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