Malicious PDF — malware analysis report

Static analysis result for SHA-256 9105711c2e815966…

MALICIOUS

PDF

74.4 KB Created: 2020-08-28 16:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f847ef6ce55555cc47245227cd939531 SHA-1: 68e47170f70538164a3f857fb17c42181e973caa SHA-256: 9105711c2e8159662a5cd8e0a8f68df4aac2bda9744eac4a4decd25a28666b63
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources. The primary malicious URL identified is https://ttraff.com/pify?keyword=tokyo+ghoul+saison+1+no+censure, which is likely used to direct users to a malicious site. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=tokyo+ghoul+saison+1+no+censure
    • http://xizizatar.smarterwaytowrite.com/uploads/1/3/1/8/131871597/sakixumewovure.pdf
    • http://files.victoriacableart.com/uploads/1/3/1/3/131381555/vanaduxof.pdf
    • http://files.gracenstrength.com/uploads/1/3/0/8/130814127/b056c23a8289c59.pdf
    • https://cdn.shopify.com/s/files/1/0439/2579/9067/files/48190974146.pdf
    • https://cdn.shopify.com/s/files/1/0437/6225/3975/files/sujet_brevet_2019_mathmatiques.pdf
    • https://cdn.shopify.com/s/files/1/0436/0264/1059/files/advantages_and_disadvantages_of_comparative_balance_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/87671800601.pdf
    • https://cdn.shopify.com/s/files/1/0434/8700/2790/files/jobipipemuvesikumevudipe.pdf
    • https://cdn.shopify.com/s/files/1/0464/7183/9912/files/asco_cap_guidelines_her2_2018.pdf
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/gemadalimadofitufesipak.pdf
    • https://cdn.shopify.com/s/files/1/0430/0229/8521/files/75127023306.pdf
    • https://cdn.shopify.com/s/files/1/0437/7991/5937/files/36848220642.pdf
    • https://cdn.shopify.com/s/files/1/0431/8884/6753/files/67904632868.pdf
    • https://cdn.shopify.com/s/files/1/0432/6440/9764/files/58191970398.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20785775646.pdf
    • https://cdn.shopify.com/s/files/1/0432/7669/7760/files/loruwa.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006501.bin
3aa460d38d04d8029ca521a522300828aa23422c971592b62af55051c362e4b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6501 33808 bytes
font_01_sfnt_off0000cdfd.bin
a2984724eb14ceb5d3001bdc3df6b738518b09751f987958edeb7e3398b7a65a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFD 5228 bytes
font_02_sfnt_off0000dfcc.bin
fb24df357f3d624bc5cb4ed927947bd1b72c8e663306c2b704926885b3458ab7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCC 10544 bytes
font_03_sfnt_off000103e3.bin
1ab062cb0114d3bb472eb52d2d7fe9071dcf2213c4b520f1d92e0c3e34ce1573		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103E3 16424 bytes

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