Malicious PDF — malware analysis report

Static analysis result for SHA-256 579bd20402119942…

MALICIOUS

PDF

40.7 KB Created: 2020-08-14 00:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2291278daf8ab7b533778e8528eb6454 SHA-1: cae5d2bd8054834b23b9db4b5495fab730f704c9 SHA-256: 579bd20402119942d3dfdbe2ce4f44c61eb5a0b657f33bd7ee7a8e10d08f6f7f
154 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to a 'frozen shoulder treatment protocol', likely a lure to encourage users to click the malicious link. The ML classifier strongly supports the malicious nature of this PDF.

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=frozen+shoulder+treatment+protocol+pdf
    • http://files.hhcheesecakes.com/uploads/1/3/0/7/130776327/gorokijedoxok-zowuma-venagifipotigi.pdf
    • http://files.craftedtokeep.com/uploads/1/3/1/1/131163610/fowadejukeneru.pdf
    • http://jaxaze.artresistance.com.au/uploads/1/3/1/6/131606490/zudefuviliso_wapifel_jogezolatepame_muxiwo.pdf
    • http://rufowadal.stanleyskidsministry.org/uploads/1/3/1/3/131383483/nitavonobipeto-zoxudiwesoragi-jakexobu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/gutetotikip.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/selarebovakutodixosanu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mozesuseb.pdf
    • https://cdn.shopify.com/s/files/1/0430/3683/5993/files/behringer_x32_manual_deutsch.pdf
    • https://cdn.shopify.com/s/files/1/0430/5007/4269/files/18970446548.pdf
    • https://cdn.shopify.com/s/files/1/0429/0389/6230/files/63538199641.pdf
    • https://cdn.shopify.com/s/files/1/0433/7077/4693/files/32719222433.pdf
    • https://cdn.shopify.com/s/files/1/0432/1955/0370/files/93486858587.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3089/files/dabebop.pdf
    • https://cdn.shopify.com/s/files/1/0450/4656/2966/files/business_plan_restaurant_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/9775/8622/files/bag_making_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/9640/8218/files/talavekedukewafeluxipes.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_off00006121.bin
2355548521424d7a5ae11ce5907e802f918be7dc16c0756aa2a57ce3460199d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6121 5400 bytes
font_01_sfnt_off0000735a.bin
53eef5c94386325ab7915b91f4ef22ca5990ddea20c182df03af375d85f0ed2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x735A 10144 bytes