Malicious PDF — malware analysis report

Static analysis result for SHA-256 ece4b84fe097d9e3…

MALICIOUS

PDF

52.0 KB Created: 2020-08-27 19:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c815828a315cdd698bdaf68322b5578 SHA-1: b8a6d62e48da33b4439c72ab03115ba6df6ccbc2 SHA-256: ece4b84fe097d9e33b285561d49a93e31b74ce79e37843e412657861e5de2653
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'certificate pdf' and includes the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous external links, many hosted on seemingly unrelated domains, indicates a link farm used for SEO poisoning or to obscure the final malicious destination.

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.club/pify?keyword=sere+100+certificate+pdf
    • http://files.charmingfarminggoats.org/uploads/1/3/0/7/130775652/2f5ccf0.pdf
    • http://nasan.clearwaterninja.com/uploads/1/3/2/6/132682076/b295dc098698.pdf
    • http://files.catarellaphoto.com/uploads/1/3/1/3/131398075/zatamuw-tatopux.pdf
    • http://files.katierizzoartandawesome.com/uploads/1/3/0/7/130775971/rowumonakaleru-niretevuf-sipejudisevawug.pdf
    • http://rogudidun.vibrationalinstitute.com/uploads/1/3/1/4/131454950/4218353.pdf
    • https://cdn.shopify.com/s/files/1/0438/4253/5574/files/nozunafezejulegasokosawim.pdf
    • https://cdn.shopify.com/s/files/1/0428/1778/1927/files/zadegi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/kugiwago.pdf
    • https://cdn.shopify.com/s/files/1/0427/5086/9671/files/23682305620.pdf
    • https://cdn.shopify.com/s/files/1/0440/8888/5400/files/bikorozov.pdf
    • https://cdn.shopify.com/s/files/1/0463/6806/3643/files/takowamoponote.pdf
    • https://cdn.shopify.com/s/files/1/0436/9317/9030/files/saxebewitedoxepave.pdf
    • https://cdn.shopify.com/s/files/1/0434/5951/0424/files/quantitative_aptitude_test_questions.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_off00008d55.bin
157e7eb0bef6dcac576c26507e5c015480520fdb0ddfa2e6dcb578ca5caf6976		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D55 5236 bytes
font_01_sfnt_off00009f32.bin
7df62ae49167599ec96c3787109fa036251c55701ad5c198a9ad3905285d99aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F32 10704 bytes

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