Malicious PDF — malware analysis report

Static analysis result for SHA-256 24c430b269842116…

MALICIOUS

PDF

34.0 KB Created: 2020-08-10 16:52:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb05d7f7f32f09d399a666dac92dd5a2 SHA-1: 5d990022315f4bf37ba3aa7db04b21479e78b979 SHA-256: 24c430b269842116248df91dc9871ba246cb61b9a0e4f9ceec05ae5440974136
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The primary malicious URL identified is https://ttraff.ru/pify?keyword=word+order+adverbs+of+frequency+exercises+pdf, which is flagged as a malicious redirector. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, and the document body is heavily obfuscated.

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=word+order+adverbs+of+frequency+exercises+pdf
    • http://files.kgnmcjustonfire.com/uploads/1/3/2/6/132681544/xagegex.pdf
    • http://josiwikom.michelbeauvaisart.com/uploads/1/3/1/4/131409090/laziwebuvuj_waxumisusukab_dubitil.pdf
    • http://nivuxo.ironexpressltd.com/uploads/1/3/1/4/131453416/befobasisogaruv-jixari-tokuvejubimapem.pdf
    • http://files.tinagutierrezartsphotography.com/uploads/1/3/0/7/130775383/remax-taxopugazaledu-fuluxibejurifuj-lavosiraleset.pdf
    • https://cdn.shopify.com/s/files/1/0435/4883/6004/files/nikon_d70s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/97917422433.pdf
    • https://cdn.shopify.com/s/files/1/0434/8257/9110/files/8526011502.pdf
    • https://cdn.shopify.com/s/files/1/0433/5013/0846/files/distributive_property_algebra_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/4553/5400/files/53334992491.pdf
    • https://cdn.shopify.com/s/files/1/0434/1297/9869/files/64656473371.pdf
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/zujar.pdf
    • https://cdn.shopify.com/s/files/1/0436/4586/2041/files/16551349130.pdf
    • https://cdn.shopify.com/s/files/1/0430/8959/2473/files/costing_and_quantitative_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/4779452101.pdf
    • https://cdn.shopify.com/s/files/1/0428/4393/0791/files/88267271712.pdf
    • https://cdn.shopify.com/s/files/1/0430/6462/3265/files/lajumatenonosezunaju.pdf
    • https://cdn.shopify.com/s/files/1/0447/3896/9749/files/bombay_palace_kl_menu.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_off0000465d.bin
e8ea35b4e633d9364d3970f62b4a773e8abb93f4530316ae4205379e811a8a82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x465D 5628 bytes
font_01_sfnt_off000059a9.bin
305a3ff1ca6845b3c14922e0939551e3b325fa4d3a3c31284fe463ce722f8864		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A9 9768 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.