Malicious PDF — malware analysis report

Static analysis result for SHA-256 76b100f77027c51e…

MALICIOUS

PDF

78.3 KB Created: 2020-08-11 14:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 085ef58daaf224fa8b7f652310ab416b SHA-1: b29f21f8a9aa22c2f09543fd0bc884473a02a13e SHA-256: 76b100f77027c51e4dc7d9a409f3a1e8345b6b54f1d4a84b3b46378794ce8185
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=edema+agudo+cerebral+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the same URL, suggesting an attempt to lure users to malicious infrastructure. The presence of numerous other PDF links further supports a link farm or SEO poisoning tactic.

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.ru/pify?keyword=edema+agudo+cerebral+pdf
    • http://piwasov.alekkosinski.com/uploads/1/3/1/0/131070374/fugorenonofeva_kededamiwoxi.pdf
    • http://damonodad.dses.ca/uploads/1/3/1/8/131857631/7116732.pdf
    • http://files.diamondbquarterhorses.net/uploads/1/3/2/6/132681670/lakinuginukovo_jikol_pafitabiru_jevozujekibu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5137558887.pdf
    • https://cdn.shopify.com/s/files/1/0437/8243/9063/files/63352967803.pdf
    • https://cdn.shopify.com/s/files/1/0438/9978/1275/files/devereguvara.pdf
    • https://cdn.shopify.com/s/files/1/0433/8283/3308/files/duwevewenoxixumipapinelad.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/93860964498.pdf
    • https://cdn.shopify.com/s/files/1/0436/4494/4542/files/nys_45_forms.pdf
    • https://cdn.shopify.com/s/files/1/0438/0524/5597/files/81804871060.pdf
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/95407155367.pdf
    • https://cdn.shopify.com/s/files/1/0449/5890/8584/files/pengaruh_letak_geografis_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0431/9186/1412/files/zivanisedam.pdf
    • https://cdn.shopify.com/s/files/1/0433/2145/8853/files/tosigegodidazuze.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/14441832419.pdf
    • https://cdn.shopify.com/s/files/1/0431/8229/3141/files/types_of_dental_composite_materials.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/fixawuwozopedibebi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea95.bin
01738a4faa0e01943f1304f951fec32308d69606fac7a79d62cd7b4aefedef3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA95 5396 bytes
font_01_sfnt_off0000fcd6.bin
d5873375e5c1f07c8f2d48e59ca3946ca02f5762a4375578b2be6f7fcb2b0132		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD6 15404 bytes

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