Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f2f992c0c31901…

MALICIOUS

PDF

48.2 KB Created: 2020-08-11 23:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84864eccc06a895c9fe894b1c8b8b15a SHA-1: c2b69c1d304ba3001e850adc520c132c04213dfa SHA-256: 00f2f992c0c31901c450ba538d805bbebbc34665efe050825442860e5c4146f5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content. The document body, though heavily obfuscated, contains URLs that mirror those found in the extracted URL list, reinforcing the redirection attempt.

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=lexical+analysis+tutorial+pdf
    • http://files.mcagsales.com/uploads/1/3/1/4/131437655/jopilugepawa-luxozenidiwam-sizisa-fifonamunuwunip.pdf
    • http://files.eogwellness.com/uploads/1/3/0/8/130813818/2eae85eb4b929.pdf
    • http://files.lightfootkennel.com/uploads/1/3/0/8/130814513/mawatep-texazonutuzidan-ximipeju.pdf
    • http://files.villagedrivevillage.org/uploads/1/3/1/3/131380107/5511002.pdf
    • http://files.ediblegroup.net/uploads/1/3/0/9/130968968/6f69189c5988.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/devaromidirazuragagebugak.pdf
    • https://cdn.shopify.com/s/files/1/0431/4585/5137/files/darosuvuronobemorefijip.pdf
    • https://cdn.shopify.com/s/files/1/0431/1996/8417/files/bootstrap_3_panel.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/biviwuxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0296/files/37013424306.pdf
    • https://cdn.shopify.com/s/files/1/0430/9634/2695/files/53289920695.pdf
    • https://cdn.shopify.com/s/files/1/0436/0182/1859/files/femonoximizesujigalavew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33435760041.pdf
    • https://cdn.shopify.com/s/files/1/0435/4893/4295/files/94078813438.pdf
    • https://cdn.shopify.com/s/files/1/0431/7066/0508/files/bukikedajotedekukafabe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1796/0604/files/cover_letter_graphic_designer.pdf
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/14634908239.pdf
    • https://cdn.shopify.com/s/files/1/0440/6706/1910/files/wordpress_loop_custom_post_type.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_off00007579.bin
f66446c8ecc83b44ced7140eda7a9c04dc90a1398dc6b14b0ffe67b0efaf3c1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7579 5260 bytes
font_01_sfnt_off00008773.bin
b58dcc262505fcf0f15c4e9ea00ebd519adc42836f48d7907b272c9652296dc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8773 14004 bytes

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