Malicious PDF — malware analysis report

Static analysis result for SHA-256 e00cab96abd0d9e4…

MALICIOUS

PDF

41.3 KB Created: 2020-08-11 20:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c7871dcaeb03245da4f1f95a3e84822 SHA-1: efefbfeb4ca11fe85eabe5f4928b5c559d01699d SHA-256: e00cab96abd0d9e4e9250b65f5dfc470ef5288f7eb1730f1ce5ea37ee0bbe303
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=air+brake+test+questions+answers+pdf'. This indicates the document is designed to redirect users to malicious infrastructure. The presence of a PDF link farm heuristic further supports the malicious intent, suggesting an attempt to distribute malicious content or engage in SEO abuse. The document body, though partially corrupted, contains text related to 'air brake test questions answers pdf' and the authoring application, reinforcing the lure.

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.cc/pify?keyword=air+brake+test+questions+answers+pdf
    • http://files.aacabluegrassregion.org/uploads/1/3/1/4/131437330/ririfobuti_dijoralolu.pdf
    • http://files.tilstockbtclub.co.uk/uploads/1/3/0/9/130969061/f37bda.pdf
    • http://fotopuv.communitysharefoodbank.ca/uploads/1/3/2/8/132814930/wajokadiwadutifor.pdf
    • http://files.tradsocucd.com/uploads/1/3/1/3/131379833/ef74d4.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8890/files/lebejutogomivuluvo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2856/files/36018542125.pdf
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/85463009874.pdf
    • https://cdn.shopify.com/s/files/1/0433/4216/8218/files/dumuzeraseladuxegimawe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1805/8901/files/english_grammar_mcqs_test_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/2755/2661/files/attestation_de_prise_en_charge_pour_visa_touristique_france.pdf
    • https://cdn.shopify.com/s/files/1/0431/9795/6256/files/danobifopikagipula.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/bonimikej.pdf
    • https://cdn.shopify.com/s/files/1/0434/3480/3352/files/lobibopibijuwakiduk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77330784460.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_off00006308.bin
5acb496fff0cc8c361e383e47b68c15576f77dfbb15f345b19a558fec09bb62e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6308 5416 bytes
font_01_sfnt_off0000758a.bin
e60ff324bbf4fa0070de70010790d92814f42973959c3641d5e2f40ba832f8b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x758A 10296 bytes

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