Malicious PDF — malware analysis report

Static analysis result for SHA-256 699accebd6ac5033…

MALICIOUS

PDF

39.8 KB Created: 2020-08-06 04:49:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4145c6ea637ee7b2ee4b0fdb944f3d35 SHA-1: 1ea3d37277db2b3c4f6e6978c9a63eb5e51e7676 SHA-256: 699accebd6ac5033cfecc5b18ae949375c89b1446c7d8a15c1d28668d68cf366
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a link farm designed for SEO manipulation. One prominent link, disguised as a menu, redirects to a known malicious infrastructure. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent.

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=bono+s+bbq+menu+pdf
    • http://files.malawiecosolutions.com/uploads/1/3/0/7/130775953/rejapavapulomo.pdf
    • http://files.sdedesigns.com/uploads/1/3/1/1/131163687/vudoz.pdf
    • http://ronotexi.christianadam.org/uploads/1/3/1/6/131607712/6392167.pdf
    • http://files.tyedyebundlecreations.com/uploads/1/3/2/7/132740763/xuranegopigif.pdf
    • http://sogip.happi-me.org/uploads/1/3/1/4/131453177/236867.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3458/1911/files/tap_titans_2_diamonds.pdf
    • https://cdn.shopify.com/s/files/1/0434/0691/7799/files/tupaxejoxelifixotidupo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0269/9681/files/wadojefasarazijo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/gawur.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6513/files/42536593771.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/xidebegaguzo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8986/3580/files/1116070771.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/vudifufelizipanuvez.pdf
    • https://cdn.shopify.com/s/files/1/0431/0787/7017/files/strona_bierna_angielski_wiczenia_past_simple_present_simple.pdf
    • https://cdn.shopify.com/s/files/1/0430/1727/3497/files/pipud.pdf
    • https://cdn.shopify.com/s/files/1/0430/9975/0560/files/71005235375.pdf
    • https://cdn.shopify.com/s/files/1/0431/9690/7678/files/analytical_mechanics_for_relativity_and_quantum_mechanics.pdf
    • https://cdn.shopify.com/s/files/1/0432/1522/4996/files/75915554990.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_off00005c24.bin
a9c2bac1b562fb5fa3fe583eb27c7fac6f395d2578a86a8a6730e3c23c734e60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C24 5164 bytes
font_01_sfnt_off00006d9f.bin
cce7bb99641e4010c5637ad95d1c3ebc718b8e9d6b8f715f4f1c99c167c19ea8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9F 10680 bytes

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