Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b7f245f631facb6…

MALICIOUS

PDF

51.5 KB Created: 2020-08-08 12:40:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9a3b91e2b87d48ba9c6c43d220a4aa0 SHA-1: 06614ae97faa8d4042f199041578b6c541b2d7b6 SHA-256: 6b7f245f631facb672b19d74c6c8068d1da9f7244e76556d85c7b54e97c2cd51
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one prominently pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick users into visiting a malicious site. The presence of a large number of external PDF links further indicates a link farm or redirection strategy.

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=general+anaesthesia+for+caesarean+section+pdf
    • http://files.perimetertherapy.ca/uploads/1/3/1/8/131857024/5781552.pdf
    • http://files.womenofthemorningstar.com/uploads/1/3/0/9/130968956/f22ba60b.pdf
    • http://files.pennyandprince.com/uploads/1/3/1/0/131070207/bd708693ccb92.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/3028/0352/files/baofeng_uv_82_manual_em_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0432/7948/3048/files/dubavikakomamez.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/pevovepi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6384338271.pdf
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/21585302361.pdf
    • https://cdn.shopify.com/s/files/1/0434/2539/8945/files/adjektivdeklination_mit_komparativ_und_superlativ.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/6932377875.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/tudiwigaselibakupomana.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5063/files/pilepepojir.pdf
    • https://cdn.shopify.com/s/files/1/0431/0843/4077/files/pawixiwoses.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/puranejepasavira.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/cs_money_legit.pdf
    • https://cdn.shopify.com/s/files/1/0438/3696/5026/files/force_120_outboard_manual.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076eb.bin
c34e1bd0062631ec827406b661b8cbe0ea474a0c516bb78850b7ee423030b9cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76EB 5272 bytes
font_01_sfnt_off000088d3.bin
76406018fba38f082b9c0a525a7440af5363516954897cf93612e6661af0257d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88D3 10140 bytes
font_02_sfnt_off0000aba2.bin
ebaa9d42c58e3fd25c8264bcf4ef2319fee467c92cf53dcc1f377a20fc8d39b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABA2 16148 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.