Malicious PDF — malware analysis report

Static analysis result for SHA-256 9295f7dac908876a…

MALICIOUS

PDF

61.2 KB Created: 2020-08-07 22:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2486f95aadd9c34af071bbb2834d3a8e SHA-1: c1a8eb73a2beb7ac9f9571bd5f271281a9bc0686 SHA-256: 9295f7dac908876a23a5ce43006bdf355f958178467bc34dc3477395cc8c1e06
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a search result for 'Ahle hadees books urdu pdf'. The ML classifier strongly indicated maliciousness, and the PDF structure includes a large number of external links, suggesting a link farm or SEO poisoning tactic. The primary malicious IOC is the redirector URL, which likely leads to a further stage of the attack.

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=ahle+hadees+books+urdu+pdf
    • http://lugif.fullmoonontheriver.com/uploads/1/3/0/7/130776791/revolilelenif.pdf
    • http://files.pfotomessenger.com/uploads/1/3/1/0/131070911/2796957.pdf
    • http://files.irrigardens.com/uploads/1/3/0/8/130874526/1302231.pdf
    • http://files.danielakphotography.com/uploads/1/3/0/7/130775191/malopa_seburusitu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/42329725782.pdf
    • https://cdn.shopify.com/s/files/1/0435/7757/3539/files/kagolanaropoxuva.pdf
    • https://cdn.shopify.com/s/files/1/0429/5668/5468/files/dulewizezenegi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0447/files/62779418012.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/deadmau5_minecraft_skin.pdf
    • https://cdn.shopify.com/s/files/1/0431/7062/7735/files/tepexovixajo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9857/0909/files/gimilezedib.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/31852411292.pdf
    • https://cdn.shopify.com/s/files/1/0433/5966/6341/files/vopofoseno.pdf
    • https://cdn.shopify.com/s/files/1/0434/1514/2567/files/indent_text_in_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/2010/7428/files/boxogoja.pdf
    • https://cdn.shopify.com/s/files/1/0433/8991/1194/files/xelelojavatutikok.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008acf.bin
52dd9b68f7c89da68fe1b147fb7511ea8199e9ad0cc79eeb5d4db8fe26c24579		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ACF 5324 bytes
font_01_sfnt_off00009cd9.bin
3009394e1fc6eff7be82f0f2817472d729f640dfbf7e1b35a562574e48b258c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CD9 15976 bytes
font_02_sfnt_off0000cdb1.bin
ce0b215faf7f863f3b973f565cfacdd4834ad92e8bd8eac5af09428e90570562		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB1 16856 bytes

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