Malicious PDF — malware analysis report

Static analysis result for SHA-256 7005d7bfcc2a8ff0…

MALICIOUS

PDF

34.9 KB Created: 2020-08-24 06:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f72903d2b0f6c4e0b4465f6e902d164 SHA-1: e3999b2d309b645c571534f37b8b43f745f1e3b4 SHA-256: 7005d7bfcc2a8ff096eb66d97165460515ca366bbabffb1dfa7e715dad11c4ac
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector and others forming a link farm. The ML classifier strongly indicated maliciousness. The presence of a malicious redirector suggests an attempt to lead the user to harmful content or further stages of an attack.

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.cc/pify?keyword=bollywood+movie+song+video++hd
    • http://files.amcbride.org/uploads/1/3/0/8/130813314/340331.pdf
    • http://files.bgiapts.com/uploads/1/3/1/4/131437380/kopobekonarug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4357/7246/files/antonyms_words_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0434/7127/4146/files/boxabali.pdf
    • https://cdn.shopify.com/s/files/1/0440/6758/6213/files/tekoforugotugusu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/moroxobesovedorarepogud.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69892687871.pdf
    • https://cdn.shopify.com/s/files/1/0432/6539/2803/files/anniyan_songs_isaimini.pdf
    • https://cdn.shopify.com/s/files/1/0434/5105/6295/files/aviation_english_for_icao_compliance._student_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vatamukizulenekop.pdf
    • https://cdn.shopify.com/s/files/1/0431/6368/0929/files/50127562149.pdf
    • https://cdn.shopify.com/s/files/1/0429/2263/9527/files/pesapifelenodujez.pdf
    • https://cdn.shopify.com/s/files/1/0434/2782/3778/files/canada_food_guide_eating_plan.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_off00004b47.bin
87ebe88de2a109d5a9726c13cacf7a9099aca8225c8825b76c9d0e4cb9f7f51a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B47 5236 bytes
font_01_sfnt_off00005d13.bin
025e164a9039da336a185477c0e1179db101f2e67ce512ec89e27d01e777ba52
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D13 9900 bytes