Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c6398ad5c0bb9d1…

MALICIOUS

PDF

58.7 KB Created: 2020-08-24 18:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 852f0e1db58e78324cb51d74b0dcb992 SHA-1: 9b5506013fbb957a49b9e61b705a0acfd0de86b4 SHA-256: 5c6398ad5c0bb9d19ea3ef2d149e3228a6d0102126682fb7d7fe4fff4ef6e617
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'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs. The document body, though heavily obfuscated, contains the same redirector URL, suggesting it's the primary lure. No scripts were extracted, but the presence of malicious links indicates an attempt to redirect users 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=tm+malaysia+annual+report
    • http://files.xtopherjames.com/uploads/1/3/0/8/130874646/xizereket.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0462/6762/9730/files/sysmex_xs_800i_hematology_analyzer.pdf
    • https://cdn.shopify.com/s/files/1/0430/0455/9519/files/kuralolatuliritegevelok.pdf
    • https://cdn.shopify.com/s/files/1/0434/6219/7400/files/cetocort_pomada_bula.pdf
    • https://cdn.shopify.com/s/files/1/0441/3738/2040/files/noriwukabekuradofejufus.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1780/files/79501627736.pdf
    • https://cdn.shopify.com/s/files/1/0432/0883/5234/files/99333666293.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7866/files/number_analogy_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0432/3144/5156/files/berazajelikuwobalawira.pdf
    • https://cdn.shopify.com/s/files/1/0459/7140/7015/files/4liker_apk_instagram_followers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/takuz.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_off00009976.bin
296e584ad1f6f3fe8b7c05a9579162acf878da963279a728200dc124127ed4aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x9976 4900 bytes
font_01_sfnt_off0000aa04.bin
86c9b2453841dc20f9349c334efe752f1252483ad8e0dda3dfad87bc6bca3ca5
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA04 11184 bytes
font_02_sfnt_off0000cf9a.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9A 4324 bytes