Malicious PDF — malware analysis report

Static analysis result for SHA-256 981a29d7442539a7…

MALICIOUS

PDF

38.3 KB Created: 2020-08-18 20:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74f706600211fd9ec2baedc5f2c78a6c SHA-1: e3b0d75729d0bb50bb34dcab12c4544d5c59166e SHA-256: 981a29d7442539a7d065d7f9a9e11f932c2ed86502b0a77a05cf6f1119078aa3
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic search results for educational materials, with the primary link redirecting through ttraff.com. This suggests a social engineering tactic to trick users into clicking malicious links. The document body, though heavily obfuscated, contains the target URL and other embedded URLs, reinforcing the link-farming and redirection attack pattern.

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.com/pify?keyword=holt+mcdougal+us+history+textbook+answers
    • http://files.togetherforthelongrun.org/uploads/1/3/0/7/130775231/dijubovu.pdf
    • http://xoluk.osmacappella.com/uploads/1/3/1/4/131408061/gofoj_kafekoxiwenedas_fesaperadozo.pdf
    • http://files.abetteryou7.com/uploads/1/3/2/6/132681264/6040056.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/18729122756.pdf
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/13207998519.pdf
    • https://cdn.shopify.com/s/files/1/0431/4487/2090/files/favimawuvuziziw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/5928627834.pdf
    • https://cdn.shopify.com/s/files/1/0437/4354/3447/files/25458221326.pdf
    • https://cdn.shopify.com/s/files/1/0430/8867/4967/files/884266469.pdf
    • https://cdn.shopify.com/s/files/1/0437/8981/1861/files/hud_balance_sheet_account_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0434/6337/7048/files/85449687387.pdf
    • https://cdn.shopify.com/s/files/1/0434/2946/2165/files/cypher_system_rulebook_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3770/files/10364264089.pdf
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/61131082743.pdf
    • https://cdn.shopify.com/s/files/1/0431/9186/1412/files/xudiwulumosowawepuxow.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_off00004b70.bin
814fb6a7e2c71e6bcdd7316620e6ea76ebcd169a5f9563e69ca198406b7bc07b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B70 5780 bytes
font_01_sfnt_off00005f0b.bin
77fbdf2aa403b7d5c591133b1dfbc8f69c66635454d2c68038716624018248af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0B 13772 bytes

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