Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f30039118ecfbff…

MALICIOUS

PDF

43.5 KB Created: 2020-08-10 21:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21e85d8df7167101440d78faf437127a SHA-1: bac4dcdd187e0d0d6663a80e3008ed6b35e77f54 SHA-256: 5f30039118ecfbff11ededfe454360bf324a25c75db6d0cc126d9bfb5a5f0365
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to link farms and a known malicious redirector. The document body, though partially corrupted, suggests a lure related to a 'Baldur's Gate official strategy guide'. The primary malicious URL, https://ttraff.cc/pify?keyword=baldur+s+gate+official+strategy+guide+pdf, is designed to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and link farm heuristic strongly indicate malicious intent for user redirection.

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=baldur+s+gate+official+strategy+guide+pdf
    • http://files.hsemusicaltheater.com/uploads/1/3/1/4/131453081/9709ead1faa.pdf
    • http://zezelaj.julieflanders.net/uploads/1/3/0/7/130775672/wojezulegazepa-bomovutijemonez.pdf
    • http://files.petermaxwellslattery.com/uploads/1/3/1/4/131406507/dojowutusaniwoxukuj.pdf
    • http://files.tpinw.com/uploads/1/3/1/4/131483154/xigimumuturol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5446/5175/files/laziv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21659337375.pdf
    • https://cdn.shopify.com/s/files/1/0440/0647/3886/files/60215663258.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/52601803056.pdf
    • https://cdn.shopify.com/s/files/1/0433/5838/8374/files/renuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/hallelujah_here_below_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/2865/1938/files/53245077258.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/dugusobumox.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/87788147759.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6119/files/weekend_at_bernie_s.pdf
    • https://cdn.shopify.com/s/files/1/0435/5227/6632/files/vafalexaja.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/adjectives_meaning_and_examples.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_off00005b1f.bin
f90a30aa19a42de28bd3c026186bd2324f5a9203b7ee78aed621f006b8bbe43c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1F 3616 bytes
font_01_sfnt_off000067f7.bin
2a8dd96a9244711a548d2ec7e654dda1dbe04e806ac9659b134dc8782c7b3d4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F7 5476 bytes
font_02_sfnt_off00007aaa.bin
f69399b071f73e5243c490f1599ff7691c9c1ab4d2d602978e56f11f052a7372		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAA 11164 bytes

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