Malicious PDF — malware analysis report

Static analysis result for SHA-256 6990d5255f53cb0b…

MALICIOUS

PDF

45.9 KB Created: 2020-10-31 01:11:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c633eb95fb12f6e6651aab3fa2b720d6 SHA-1: 51652ef1fbfb638d7a88042cf40fc191717ba3c9 SHA-256: 6990d5255f53cb0b8bb5e5e3f0fe596e73d51c52fab029a2b274b3393eb6a364
94 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a link to known malicious redirector infrastructure. The embedded URL, https://ggtraff.ru/123?keyword=blown+to+bits+chapter+summary, is the primary indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and the presence of a malicious link suggest an attempt to redirect the user to a harmful site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://ggtraff.ru/123?keyword=blown+to+bits+chapter+summary
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/zigivilew-xanavo-baruvoram-vinititafewenud.pdf
    • https://cdn-cms.f-static.net/uploads/4385437/normal_5f902dc70361f.pdf
    • https://kugixixubeleji.weebly.com/uploads/1/3/4/3/134324677/korakofesubolozo.pdf
    • https://jirewolekaza.weebly.com/uploads/1/3/4/3/134387643/57909e.pdf
    • https://cdn-cms.f-static.net/uploads/4381762/normal_5f8e734ce884e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pevuwarobuvowa/7925985119.pdf
    • https://s3.amazonaws.com/buxoparadazegu/is_mary_had_a_little_lamb_a_christian_song.pdf
    • https://s3.amazonaws.com/sigobija/duzararitotomudiribevapaj.pdf
    • https://s3.amazonaws.com/fasanag/career_paths_banking_teacher_s_book.pdf
    • https://s3.amazonaws.com/kawotexulozax/sivepulinaxaxoxe.pdf
    • https://s3.amazonaws.com/kisimujuk/falekafizetuna.pdf
    • https://s3.amazonaws.com/gitipelut/72760728881.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_off000074da.bin
96b39951452882a4fda9ea9969b561fe7f0bc7d6ec6ad25bd220a193e6857470		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74DA 5556 bytes
font_01_sfnt_off000087ad.bin
8050eb9ce4fa0ecf4df1850b9b6c1a929401e5dc53e17108e8463a39c17d5182		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87AD 10220 bytes

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