Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8fa448b3fba36bb…

MALICIOUS

PDF

43.3 KB Created: 2020-08-11 18:15:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c228daca694e218026bad43f519b2ff0 SHA-1: 9c32dc2efab9daf2cc3a20987136d24bfc2ab071 SHA-256: c8fa448b3fba36bbb450d8714c75132ffcfb411a67d49215daf891c55313c175
150 Risk Score

Malware Insights

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

The PDF contains a link farm with 17 external links, including a critical redirector link to ttraff.cc. This indicates a social engineering attempt to lure users to malicious or deceptive content. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the redirector URL, suggesting it is part of the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wb?keyword=headway%20upper%20intermediate%20pdf%20download
    • http://files.grizzinator.com/uploads/1/3/1/4/131453006/wugib_gelapogoromime_wolonesaguni.pdf
    • http://files.mrdombaza.com/uploads/1/3/1/8/131856627/xagavixeruzoga.pdf
    • http://files.willowfree.ca/uploads/1/3/0/7/130775677/rinumugomigumexanaf.pdf
    • http://files.jpwillson.ca/uploads/1/3/1/3/131381605/1893785.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/biomassa_lamun.pdf
    • https://cdn.shopify.com/s/files/1/0436/1699/3440/files/49504190178.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/adaptability_test_question.pdf
    • https://cdn.shopify.com/s/files/1/0438/9198/2491/files/mpsc_exam_books_in_marathi_download.pdf
    • https://cdn.shopify.com/s/files/1/0446/7628/4569/files/python_calculator_code.pdf
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/97491075454.pdf
    • https://cdn.shopify.com/s/files/1/0431/2953/6676/files/13121358982.pdf
    • https://cdn.shopify.com/s/files/1/0431/3976/0295/files/some_basic_concepts_of_chemistry_notes_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0437/3417/1800/files/zatore.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/tadamatotenexaro.pdf
    • https://cdn.shopify.com/s/files/1/0438/2310/4160/files/5860320900.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/6321315099.pdf
    • https://cdn.shopify.com/s/files/1/0435/8022/7747/files/xemawomiduwapuzor.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_off00006439.bin
59a1b4bfd955b91743ee88ca5c5e64f36adef8c84388effb38f1dea74816cdde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6439 5164 bytes
font_01_sfnt_off000075c9.bin
e93664f82010256b76786056c95e68dad79e24892b468e42c784af0c5a8e653d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C9 13404 bytes

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