Malicious PDF — malware analysis report

Static analysis result for SHA-256 79365af9100ba89c…

MALICIOUS

PDF

37.4 KB Created: 2020-07-31 23:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ddee7085cee1f3e38a543ccf2ab2c11 SHA-1: 3ad3c54969b66039a0ee296022a328c08a1c9708 SHA-256: 79365af9100ba89c96b05e27d8e415fea24f2e8f6dadab92951d0e89335849ec
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, with one specifically identified as a malicious redirector. The document body mentions 'Intel hd graphics 4400 driver', suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL confirms a malicious intent to lead users to harmful content.

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=intel+hd+graphics+4400+driver
    • http://files.alekstinapoodles.com/uploads/1/3/0/7/130776519/4314976.pdf
    • http://files.thesturdybranch.com/uploads/1/3/1/3/131383386/tojekajenizog-soburul-bisofevanobo.pdf
    • http://files.ashleysandersonphotography.com/uploads/1/3/0/7/130740158/7888149.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8289/9871/files/46463297251.pdf
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/rutelezidibe.pdf
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/87916731060.pdf
    • https://cdn.shopify.com/s/files/1/0430/0177/4233/files/xigataliwesadogugu.pdf
    • https://cdn.shopify.com/s/files/1/0441/1247/8360/files/62986630251.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/73613241827.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0325/files/liwujasobemowabinijezexo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3602/4737/files/lady_antebellum_bartender.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rafudegilezenetizaxesuvos.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/xezegiso.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_off000051f0.bin
3cc8efece8fa11b6b0e557bdf4ab145db4752127fba1756b737780b5a7a77906
pdf-font-stream PDF embedded font (sfnt) at offset 0x51F0 5564 bytes
font_01_sfnt_off000064da.bin
4c26f5dc5649fa2b9929cd59e13208a3f94a1e708dc1bbf318beb6636bda2cff
pdf-font-stream PDF embedded font (sfnt) at offset 0x64DA 10696 bytes