Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee63025996120ce0…

MALICIOUS

PDF

52.3 KB Created: 2020-08-16 21:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de45213f8b76f62feb2b49e7a43dd871 SHA-1: b15cbf5965286519c5fd7383dad52b863a788de7 SHA-256: ee63025996120ce097f9a95a3a478fc2797bbf77b5c45165658e2f5e0567f5d4
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.com/pify?keyword=congenital+hypothyroidism+guidelines+ata', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated but contains the same malicious URL, suggesting the primary purpose is to lure users to malicious sites.

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.com/pify?keyword=congenital+hypothyroidism+guidelines+ata
    • http://rubufiwe.motionsong.com/uploads/1/3/1/4/131408071/nijikumewo-kulenewujonofu.pdf
    • http://files.ittybittydance.com/uploads/1/3/1/8/131856188/3768136.pdf
    • http://rebofaju.mountshannonarboretum.com/uploads/1/3/1/0/131070450/398677.pdf
    • http://files.birdsofafeathershoppetogether.com/uploads/1/3/1/3/131398360/minapilama_doturepotikiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8601/1813/files/aizen_vs_everyone.pdf
    • https://cdn.shopify.com/s/files/1/0432/7283/1134/files/different_types_of_cutting_tool_materials.pdf
    • https://cdn.shopify.com/s/files/1/0430/5374/4279/files/ravimubafobopajuv.pdf
    • https://cdn.shopify.com/s/files/1/0448/0407/9778/files/cosmic_ray_physics.pdf
    • https://cdn.shopify.com/s/files/1/0439/4074/1275/files/83752891083.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/soxojigukob.pdf
    • https://cdn.shopify.com/s/files/1/0430/9693/2505/files/kizozomewolamupipakudoza.pdf
    • https://cdn.shopify.com/s/files/1/0434/8998/4674/files/gametaji.pdf
    • https://cdn.shopify.com/s/files/1/0432/9711/2219/files/critical_race_theory_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sakemiribukewud.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_off00008129.bin
eb857f0e752204a9808a4df4fb1a6f81247a6d0b114cdb51a6e57343699c57fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8129 5380 bytes
font_01_sfnt_off0000934a.bin
4411a680777cfc442e449c08391621fc1b9d49a4684ee00450e65ee5dc517970		 pdf-font-stream PDF embedded font (sfnt) at offset 0x934A 10112 bytes
font_02_sfnt_off0000b5da.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5DA 4324 bytes

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