Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd273ea39d7cdac…

MALICIOUS

PDF

50.8 KB Created: 2020-08-26 18:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 093709647565f0a31f5a1f77ceac4887 SHA-1: 434152329cb5b6d49965f881a9585edc0c125eaf SHA-256: 0dd273ea39d7cdac2d12653906308245b97dbb7af30b28574cd743c399eb7e71
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to lure the user to a potentially harmful site.

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=psaume+151+tob
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0449/2325/6999/files/java_programming_examples_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5868/files/eset_username_and_passwords.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32732230761.pdf
    • http://jasiw.pineypawn.square.site/uploads/1/3/1/3/131380213/parale.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/selezagijisexalafo.pdf
    • https://cdn.shopify.com/s/files/1/0438/2189/1746/files/hex_code_with_opacity.pdf
    • https://cdn.shopify.com/s/files/1/0428/1758/5308/files/11571136959.pdf
    • https://cdn.shopify.com/s/files/1/0437/2935/4903/files/57946205159.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8541/files/88076407490.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_off00007bb8.bin
70a8629e713c0c641fefa2f22fe09943272628564d930ee23b6b4b774379d072
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB8 4748 bytes
font_01_sfnt_off00008be6.bin
f70f893f180ce795f076ae5f0cb5fdf1f6f170d589e19b8e03325b3546284690
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE6 10788 bytes
font_02_sfnt_off0000b097.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xB097 4324 bytes