Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d8bd019149b337f…

MALICIOUS

PDF

52.3 KB Created: 2020-08-22 10:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b3161c510f9d5063c959276b6f753f1 SHA-1: 6aa850f02102bfeb862f47fd53dcf6b20592d65e SHA-256: 8d8bd019149b337f9f0f027207dedd1ac03108eff67e684fe3e4e5be1a196583
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is embedded within the document body, suggesting a phishing or scam attempt. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to manipulate search engine results or distribute content. The ML classifier strongly flagged this PDF as malicious.

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=navigateur+internet+pour+tablette+android
    • http://files.wildandbeast.com/uploads/1/3/0/8/130874680/buzumiwipemi_kirimetu_sonewapevisedo_jalusitupogogu.pdf
    • http://nixef.careerplanninghomepage.net/uploads/1/3/0/7/130775934/dd5525fe9c.pdf
    • http://files.statisticsfromatoz.com/uploads/1/3/1/4/131437981/naribisi.pdf
    • http://files.mthooddance.com/uploads/1/3/2/7/132740965/b7fce8.pdf
    • https://cdn.shopify.com/s/files/1/0436/0755/6258/files/40624197289.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/weduvili.pdf
    • https://cdn.shopify.com/s/files/1/0432/9232/8104/files/fugetokekodoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/3728/6812/files/7621020125.pdf
    • https://cdn.shopify.com/s/files/1/0432/2348/2525/files/75175315201.pdf
    • https://cdn.shopify.com/s/files/1/0431/0532/1109/files/hurst_police_department_police_reports.pdf
    • https://cdn.shopify.com/s/files/1/0429/0304/4263/files/49818772065.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/24517628489.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/21485513707.pdf
    • https://cdn.shopify.com/s/files/1/0445/8142/1215/files/how_to_make_alkaline_water_at_home.pdf
    • https://cdn.shopify.com/s/files/1/0439/0469/6472/files/wilud.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3934/files/fafinozogelujotes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fupibi.pdf
    • https://cdn.shopify.com/s/files/1/0440/1355/1781/files/xojotogizorolopefogituvi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008114.bin
560887b853103608cf336bf36e0341fcdd89db7c359c0b2fb405fa0c1e6cb0a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8114 5000 bytes
font_01_sfnt_off00009219.bin
d6e526a8cc632b3e643e25eccd01172852ae485e00b4a98a7729d05e6986daa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9219 10604 bytes
font_02_sfnt_off0000b3fa.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3FA 4324 bytes

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