Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc9d89396e2843d…

MALICIOUS

PDF

45.0 KB Created: 2020-08-01 06:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d68631703d90cee5e7b323fe20cda0e SHA-1: 0f42cfa3ce4eaa75b29dbaeb0fef254f1a7d2bea SHA-256: 1dc9d89396e2843d6bcb818de8c6e027607f48399254530fda8df21298d3d8dd
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the same redirector URL and references a 'gorillaz gorillaz zip download', suggesting a lure for downloading potentially malicious archives. The ML classifier strongly supports the malicious verdict.

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=gorillaz+gorillaz+zip+download
    • http://files.sinyonshuntay.com/uploads/1/3/0/7/130776828/2851670.pdf
    • http://files.blackandpetrichor.com/uploads/1/3/2/6/132681504/229365a52b6f0b.pdf
    • http://files.volunteerteachkenya.net/uploads/1/3/1/4/131452953/7f4c093b5b5acf.pdf
    • http://files.trobertfowler.com/uploads/1/3/1/4/131438616/zabijogawosu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0304/4263/files/paxaruvovisogifazazovon.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0118/files/zawubofo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9087/0423/files/402435130.pdf
    • https://cdn.shopify.com/s/files/1/0437/7768/7701/files/68389529869.pdf
    • https://cdn.shopify.com/s/files/1/0433/5009/8085/files/60849456200.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4839/files/67723102317.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1116/2790/files/iphone_model_number.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/32442185335.pdf
    • https://cdn.shopify.com/s/files/1/0437/2175/2731/files/ralavazikoso.pdf
    • https://cdn.shopify.com/s/files/1/0437/5959/9765/files/14683943085.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_off00005807.bin
3c9c922bb41dfc733407deaa7b0e6c59cd89bf3037b827307f9176146f57fcce
pdf-font-stream PDF embedded font (sfnt) at offset 0x5807 4712 bytes
font_01_sfnt_off0000681d.bin
9aaf2031f1ea8014935ebed12b6c89976da3555593fa3c5dd9bb227052111432
pdf-font-stream PDF embedded font (sfnt) at offset 0x681D 15272 bytes
font_02_sfnt_off000096f6.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x96F6 4324 bytes