Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf46c1bdb13533a…

MALICIOUS

PDF

41.2 KB Created: 2020-08-29 15:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf6d5b9428d5eddf80fbc5b2dd792fd7 SHA-1: 624f0b911a4406320a3ae2f9a4f4422dfe76bc89 SHA-256: abf46c1bdb13533a7da93f73794a45dd916ffe57ce5da0b7f7aff8ece438cfb5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious Link

The PDF contains a large number of embedded links, including a critical redirector link to 'ttraff.ru'. This indicates the document is designed to lure users to malicious sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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/wix?keyword=tempstar+smart+comfort+2000+manual
    • https://static.usrfiles.com/ugd/b8c837_69cf917caf734bc190fba76d69154479.pdf
    • https://static.usrfiles.com/ugd/b8c837_81a30c15573c4d93b5b754f527edbcfe.pdf
    • https://static.usrfiles.com/ugd/b8c837_e022dddd4185465698943bf8c13a8487.pdf
    • https://static.usrfiles.com/ugd/b8c837_a292157288c34cb6a8fde7ba316f5abb.pdf
    • https://static.usrfiles.com/ugd/b8c837_301c36b947394c2687d7119b95287eb0.pdf
    • https://static.usrfiles.com/ugd/b8c837_29f53c28561d4bb1a99562316b0557f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_d9d831bda95e4f87ae51f78058eb8043.pdf
    • https://static.usrfiles.com/ugd/b8c837_d875d13cd1e6451d9ac5728e0dbfcc71.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1945/files/sapupoli.pdf
    • https://cdn.shopify.com/s/files/1/0433/6336/9125/files/administracion_de_la_calidad_total_libro.pdf
    • https://cdn.shopify.com/s/files/1/0432/7440/3996/files/wugoxixinirodedututifagaf.pdf
    • https://cdn.shopify.com/s/files/1/0458/5432/6937/files/kindergarten_worksheets_rhyming_words.pdf
    • https://cdn.shopify.com/s/files/1/0465/0156/0478/files/mazda_axela_english_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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b9e.bin
2154acb5e390f5405ee6d608ebc133cd11f3c1ddc4cb058ff54e226c9099ea9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B9E 5384 bytes
font_01_sfnt_off00005dce.bin
c026978d05da8bf4a030b490a4c0c65e869d57d9d76972a6fbd96844eb6bede7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCE 10412 bytes
font_02_sfnt_off000081a7.bin
026a586128736d29da6542416095f0b483470add235992e736c82304e06d1e5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x81A7 16064 bytes