Malicious PDF — malware analysis report

Static analysis result for SHA-256 117cdc613093ecfd…

MALICIOUS

PDF

52.7 KB Created: 2020-08-29 09:38:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db5e70fee6ec5427a193ac18ea21788f SHA-1: 684cba044caeb067860f7bb326b3e81ccd5ffa18 SHA-256: 117cdc613093ecfd453bf0c4688f3472b291af199c95172bb1564f036f6b8169
154 Risk Score

Malware Insights

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

This PDF document contains numerous links, many of which point to external PDF files, suggesting it is part of a link farm or SEO manipulation scheme. One prominent URL, 'https://ttraff.com/wix?keyword=saatlik+hava+durumu+menemen', is flagged as a malicious redirector, indicating a high likelihood of leading users to malicious content. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=saatlik+hava+durumu+menemen
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_e2979017001a4e9bbfb78e298b0fcf75.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5394b67b6eb420ba181c0e7eca91549.pdf
    • https://static.usrfiles.com/ugd/b8c837_838efc8a3518498f8efab51304fe55c0.pdf
    • https://cdn.shopify.com/s/files/1/0440/1148/7397/files/markiplier_welcome_to_the_game_2.pdf
    • https://cdn.shopify.com/s/files/1/0440/6149/1352/files/jozuxatukogewelemetugog.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4367/files/romeo_and_juliet_final_test.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4f957d428584da5bba5d44e72cf1a90.pdf
    • https://static.usrfiles.com/ugd/b8c837_afdbcacafee24e1ba8b4138dd5587e7b.pdf
    • https://cdn.shopify.com/s/files/1/0430/7497/7945/files/35181760849.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3370/files/read_n_characters_given_read4.pdf
    • https://cdn.shopify.com/s/files/1/0431/4615/0039/files/sports_vocabulary_words.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/29612017264.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_off0000827a.bin
c6664d1c19814a1390e7ca54d2b6506b2f41a47ca85e63b490440fa58fdff7c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x827A 5116 bytes
font_01_sfnt_off000093b2.bin
d5089fa8ac90425bbe0cbde1f234d8f08137a66b5e0378274006e785b77d7a70
pdf-font-stream PDF embedded font (sfnt) at offset 0x93B2 16484 bytes