Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf9069814b1da594…

MALICIOUS

PDF

48.0 KB Created: 2020-08-07 18:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46e9c928fed19f90a7fd3b024990c91c SHA-1: 404797aa6eb4d0966cd23466f14aa1c396f431a9 SHA-256: bf9069814b1da594a74f1fdea053b50abc351be394ad02956f741964a5a00bd8
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to PDF files hosted on various domains. One of these links, 'https://ttraff.com/pify?keyword=conus+medullaris+syndrome+pdf', is identified as a malicious redirector. The document body contains garbled text but also includes the same URL, suggesting it's the primary lure. The presence of a link farm and a malicious redirector indicates a phishing or scam attempt.

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=conus+medullaris+syndrome+pdf
    • http://files.power4lifenow.com/uploads/1/3/2/7/132712225/6540855.pdf
    • http://files.thechristmasfarm.org/uploads/1/3/1/8/131871850/zaxufepiba-wafotulodamaduz.pdf
    • http://files.simeoncogswell.com/uploads/1/3/1/8/131856009/2cb79a.pdf
    • https://cdn.shopify.com/s/files/1/0434/2274/4741/files/45742347294.pdf
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/mepodiserofumawozilizubu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7872/9374/files/38548119165.pdf
    • https://cdn.shopify.com/s/files/1/0438/4374/7990/files/zefevodo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/77806620213.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2056/files/64873380122.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1662/files/79470549010.pdf
    • https://cdn.shopify.com/s/files/1/0432/1073/5780/files/12328969554.pdf
    • https://cdn.shopify.com/s/files/1/0432/3773/6603/files/50359420842.pdf
    • https://cdn.shopify.com/s/files/1/0440/4982/5942/files/quantitative_aptitude_questions_with_answers_for_interview.pdf
    • https://cdn.shopify.com/s/files/1/0429/0691/0876/files/category_management_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2332/files/83492306079.pdf
    • https://cdn.shopify.com/s/files/1/0429/1097/4111/files/narexe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/algebra_2_prentice_hall_answers.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_off00007cfe.bin
5872d31bc67f8fe36007e95aff2eca2ef73cc1c63ff2d16ce52c7e21e307a01a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFE 5196 bytes
font_01_sfnt_off00008e92.bin
d78533e856b0d1ad1729041c8dfa592fe7ae278b13f3765e16b0ac4567a4803d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E92 10620 bytes

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