Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf9d50e2b6db2e5…

MALICIOUS

PDF

42.2 KB Created: 2020-08-31 18:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 645a26c801fa98671656737d968ad1e7 SHA-1: 3cc861aedf561690c9812174b1e1e2873e846835 SHA-256: ccf9d50e2b6db2e5f84ef08c2d83af37b19f5c0898a848bdd91a2e049594fcbb
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The embedded URL 'https://ttraff.ru/wix?keyword=application+manager+android' is likely the initial lure, redirecting to malicious infrastructure. The document body, though heavily obfuscated, contains references to the same URL and other PDF links, suggesting a social engineering attempt to drive traffic to malicious sites.

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=application+manager+android
    • https://static.usrfiles.com/ugd/40512e_dfff9e76da784e2c9be18525b08d4361.pdf
    • https://static.usrfiles.com/ugd/f84671_8aed2646e13347f0899940a861be1cd1.pdf
    • https://static.usrfiles.com/ugd/b8c837_2977d4f4b08f41228e7cb93640987667.pdf
    • https://cdn.shopify.com/s/files/1/0430/8392/3609/files/article_in_english_grammar_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0429/5540/7511/files/shadowhunters_ciudad_de_los_angeles_caidos.pdf
    • https://cdn.shopify.com/s/files/1/0432/4674/7803/files/brother_hl-_2240_driver.pdf
    • https://static.usrfiles.com/ugd/b8c837_768799232fe64d4eb1ea42bf39b28721.pdf
    • https://static.usrfiles.com/ugd/21e6f2_0eb08d7056b84f368f6ed718ca4de517.pdf
    • https://static.usrfiles.com/ugd/b8c837_0cd9aa6b21b14e98aed75f44e3f86962.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_45dec6b753e1426ebb1539b65a6ffa82.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_off00006831.bin
8ca2e840c3a7ea5dec878e97e238b4ec732530000645c4611be8b6c1d365ead6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6831 5204 bytes
font_01_sfnt_off000079c5.bin
24bdf6808caef0eb75ea3837d0ae6d5da24250b4a0ddd5c6a4e37b70e9358004		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C5 10092 bytes

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