Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b85bb057c1c0ecb…

MALICIOUS

PDF

49.1 KB Created: 2020-09-02 19:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 632905db19ccbc861299c129de4a4203 SHA-1: 74288163463bfee8f4b239097ba8a3becbe99ba5 SHA-256: 7b85bb057c1c0ecb5bf9268e2768331eb54ad24632dfe82a3fcb2e66d35cffb9
140 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a critical finding of a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that aligns with the malicious redirector finding. The presence of a 'callback phishing phone lure' heuristic suggests a social engineering attempt to trick the user into calling a number, likely related to the malicious link's purpose. The file is identified as a PDF, and the primary malicious IOC is the redirector URL.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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.club/wix?keyword=old+testament+bible+history+guidebook
    • https://static.usrfiles.com/ugd/6924eb_f41d513af712459ba7d20cf2ee39d55b.pdf
    • https://static.usrfiles.com/ugd/9904c2_7dabd31b17f8459bab519e5c087cc0e8.pdf
    • https://static.usrfiles.com/ugd/10b11f_60940eb2bc23462fa5745f3f05580fed.pdf
    • https://static.usrfiles.com/ugd/c0a468_9326fbef77fe4ebb82899b781a7c8521.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2406/files/business_law_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6191/files/dimmu_borgir_mourning_palace_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/pudesuxagajosozuzositud.pdf
    • https://cdn.shopify.com/s/files/1/0435/7806/5059/files/el_nuevo_cine_mexicano.pdf
    • https://cdn.shopify.com/s/files/1/0429/5471/9395/files/jirusukobojir.pdf
    • https://static.usrfiles.com/ugd/a86d68_75a091af32f1427f81c0c8adbbd60c27.pdf
    • https://static.usrfiles.com/ugd/c162b3_063d2f6e92504b2c8a353636e63de744.pdf
    • https://static.usrfiles.com/ugd/299074_55d38a95dd2240d5a677e7bc8d8c1b22.pdf
    • https://static.usrfiles.com/ugd/ae15ca_6431e3ad85c74035a7e1ef73bf7d712b.pdf
    • https://static.usrfiles.com/ugd/b8c837_a58955b17278475283872132fe14e640.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad002ab6e37341da8a0a82754545ee94.pdf
    • https://static.usrfiles.com/ugd/b56239_6de6f488d0e34e41b7c4a007b935724c.pdf
    • https://static.usrfiles.com/ugd/5af86b_f47df5bfe4684595824e5c6abe3a93ee.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069f8.bin
9964274aaa7912311a9a7d71a20d228f8f9265d2d9c59663f6188ff0ad69e4e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69F8 5572 bytes
font_01_sfnt_off00007cb9.bin
8bd93da52495b337a722e76418be720c9ad29741807d2fad70ac48b1a10120e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB9 10476 bytes
font_02_sfnt_off0000a0c0.bin
10870da844573615f323bfd7084e94cc064fb5b63d2b27e01fb189e311c4e78e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0C0 16460 bytes

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