Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5bf9976caddb1d…

MALICIOUS

PDF

48.6 KB Created: 2020-08-08 04:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6ed85cdd60ef9a0185a34b0cd92047f SHA-1: 64668e34adac19f2cbda694be16aa58bb0d0e4af SHA-256: 0d5bf9976caddb1d8e40a3e662dad4e478e6e9712daacb32cf1e46791e2c49ac
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious due to its inclusion of a large number of external links, forming a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=jesus+bleibet+meine+freude+pdf+organ', is flagged as a known malicious redirector. The document's structure and the presence of numerous links suggest an attempt to direct users to potentially harmful websites, likely for phishing or malware distribution.

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=jesus+bleibet+meine+freude+pdf+organ
    • http://files.carolvoss.com/uploads/1/3/0/7/130738484/keken.pdf
    • http://files.venablesgoldsmith.com/uploads/1/3/2/6/132682124/7546721.pdf
    • http://files.lamarvetclinic.com/uploads/1/3/2/6/132681632/9962216.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2881/5783/files/88264288193.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/83689383373.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1674/files/4092909479.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8917749958.pdf
    • https://cdn.shopify.com/s/files/1/0429/8414/5049/files/mibitodajuki.pdf
    • https://cdn.shopify.com/s/files/1/0438/0898/1152/files/jejilag.pdf
    • https://cdn.shopify.com/s/files/1/0429/3974/4419/files/xumirarupot.pdf
    • https://cdn.shopify.com/s/files/1/0434/8474/1798/files/rumeditusuwusijumoguw.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/senizinidakuxivopoviwig.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/vupezu.pdf
    • https://cdn.shopify.com/s/files/1/0441/3983/9640/files/general_ability_test_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/tozinoz.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_off0000678e.bin
a3e01a4f96f156fc3b32cf4d9e1e97d6eca418491cf001cd629597ff45277548		 pdf-font-stream PDF embedded font (sfnt) at offset 0x678E 5492 bytes
font_01_sfnt_off00007a15.bin
6a5d5b061064ef431d87a9f7237236d613e246df9caceeb6522111058fa25ac2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A15 11372 bytes
font_02_sfnt_off00009fb2.bin
75e56e6dc913dabd8b3c9cd5ea70025aeab0fff598b2ab24d9d660aeb9535195		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB2 16184 bytes

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