Malicious PDF — malware analysis report

Static analysis result for SHA-256 6294b0ca1e8753d4…

MALICIOUS

PDF

41.1 KB Created: 2020-09-15 17:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 001bfe707bf8a98fa054bbbb46b7cc5a SHA-1: ab171b05f5b04457255ab2f9b38cf10a5a0feef4 SHA-256: 6294b0ca1e8753d4b020577292860c57e94aee1de3b6e2caa80369a46f883acf
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests an attempt to direct users to malicious infrastructure, likely for further exploitation or phishing.

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/wb?keyword=btd%206%20hacked%20pc
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0458/6425/5641/files/hearts_of_iron_4_guide_division.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69262577592.pdf
    • https://cdn.shopify.com/s/files/1/0428/8859/3567/files/24565451942.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/definition_of_teaching_methods_and_strategies.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/77279429242.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/incomplete_dominance_and_codominance_practice_worksheet.pdf
    • https://static.usrfiles.com/ugd/c0fca2_54490600d14e4d7c83fa96387610d83d.pdf
    • https://static.usrfiles.com/ugd/8c0e65_8b4e949feb314734b0e495b8d2837a63.pdf
    • https://static.usrfiles.com/ugd/921909_a267405b7b46498da4cb5baff8f9d0b5.pdf
    • https://static.usrfiles.com/ugd/35f767_7bfdd2823f40407e92070fd7ae1b3eb7.pdf
    • https://static.usrfiles.com/ugd/3cb679_9a967f378fc548829c28985d8b6148d6.pdf
    • https://static.usrfiles.com/ugd/cc1a03_d554ced1bc584d7383865c858043b431.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056bc.bin
500760d5d0707e46527350e3afcf500a308585f4660f16a6abff648435e991c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x56BC 4648 bytes
font_01_sfnt_off0000668a.bin
265d8694accc71ada1706557b35200f9227659bb9b35c692648a72d9823853f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x668A 10420 bytes
font_02_sfnt_off00008a0e.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A0E 4324 bytes