Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbc59554eda6d016…

MALICIOUS

PDF

41.0 KB Created: 2020-08-05 11:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2127df5a13e550cac8c3ce4cd3d606fd SHA-1: f94a4046acf776263e4807a303aa1de816913a85 SHA-256: cbc59554eda6d01653cb1b20cc5f37530add713e906d87fb16ae0f05fcc584ea
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to 'ttraff.com', suggesting a phishing or redirection attempt. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'electrical and thermal conductivity of metals pdf'. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. The presence of a link farm further supports the malicious nature of this document.

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=electrical+and+thermal+conductivity+of+metals+pdf
    • http://files.soniagfh.co.uk/uploads/1/3/0/7/130740165/kajipunazotuxe.pdf
    • http://files.jasminanedanovski.com/uploads/1/3/1/6/131636903/8845307.pdf
    • http://jopasurig.mythnmagik.com/uploads/1/3/1/3/131380480/nelusupupozego-jakemudovulikur-fuzolilinodosa.pdf
    • http://files.packwoman.com/uploads/1/3/1/8/131856852/756353fe4.pdf
    • https://cdn.shopify.com/s/files/1/0431/7514/9719/files/lomomojubenumoli.pdf
    • https://cdn.shopify.com/s/files/1/0432/6667/0745/files/employees_state_insurance_regulations_1950.pdf
    • https://cdn.shopify.com/s/files/1/0431/6495/8879/files/watch_friends_season_2.pdf
    • https://cdn.shopify.com/s/files/1/0430/2913/5521/files/81050766849.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8723/files/jirus.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4981/files/7737232333.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/muzivarejuvixufuwokex.pdf
    • https://cdn.shopify.com/s/files/1/0433/4016/9366/files/business_card_pixel_size.pdf
    • https://cdn.shopify.com/s/files/1/0432/5208/9000/files/58337187166.pdf
    • https://cdn.shopify.com/s/files/1/0434/2048/3751/files/83962482199.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/74177619547.pdf
    • https://cdn.shopify.com/s/files/1/0431/8648/7455/files/star_wars_rouge_squadron_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jakenetukuzalavat.pdf
    • https://cdn.shopify.com/s/files/1/0432/6424/5922/files/komaxudasenolidos.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_off00006180.bin
e0d285ffc1e628b72ef6a158d2de988a85204309c236bf7aeff15d56d771871e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6180 5516 bytes
font_01_sfnt_off0000742a.bin
3e9255fe2c54548a28df68416c795b58574a6089853e732be1986a61b823ee19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x742A 10160 bytes

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