Malicious PDF — malware analysis report

Static analysis result for SHA-256 976f214c2131f676…

MALICIOUS

PDF

37.1 KB Created: 2020-08-07 08:40:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38af94e90246dc63e62037ca444e4c54 SHA-1: 399c4e001428681c405ebbaf361b23d269c5ee88 SHA-256: 976f214c2131f676e09ad7bc72d512d9f8ba52c87222e58bf81b67f10440399f
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to ttraff.cc, indicating a malicious redirection attempt. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the intent is to lure the user to a potentially harmful website under the guise of providing educational material.

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=glencoe+mcgraw+hill+algebra+2+workbook+pdf
    • http://files.mindfulserenityonline.com/uploads/1/3/0/8/130874629/pezozulaleku.pdf
    • http://files.stavecreekbc.com/uploads/1/3/2/3/132303382/tajosajawakaxukok.pdf
    • http://xuzivas.coulterhouseapparel.com/uploads/1/3/2/6/132681556/zanog-raguboni-darunederif-basaze.pdf
    • https://cdn.shopify.com/s/files/1/0441/3535/0424/files/50013055437.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/41860908162.pdf
    • https://cdn.shopify.com/s/files/1/0437/5104/7329/files/74558139420.pdf
    • https://cdn.shopify.com/s/files/1/0433/6159/9656/files/xizozafowilubigeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/9875/0629/files/fixesazeda.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/codon_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0428/5467/8687/files/melagemuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/1901/0201/files/miniralefavovewoputo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9648/files/sapuwe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6809/6661/files/xibavojoporiwiberova.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f81.bin
73e8a85014075eef9bec70955faac58d2a656e9eb2479c67e1126e9b7a5cd1a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F81 5852 bytes
font_01_sfnt_off0000635a.bin
27f4c0ae49a78e929930cf061e02379e5f61d86eae5421896b77293800fc970d
pdf-font-stream PDF embedded font (sfnt) at offset 0x635A 10152 bytes