Malicious PDF — malware analysis report

Static analysis result for SHA-256 3028ca9b686545ac…

MALICIOUS

PDF

53.7 KB Created: 2020-08-20 13:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f7b63b21c015b4185cfe265caa8e373 SHA-1: 173c0667c6cc7997443220a31543e9b265808e0d SHA-256: 3028ca9b686545ac1683557495ccc4a914b1d8c3a02d2a76df8ba0dcc98574d7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, many hosted on Shopify, designed to appear as legitimate documents but ultimately redirect to a malicious URL. The primary malicious URL identified is https://ttraff.com/pify?keyword=classification+report+precision. This indicates a link-farming or redirection attack designed to lead users to malicious content.

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=classification+report+precision
    • http://webed.moodyplumbinginc.com/uploads/1/3/1/4/131438044/3458667.pdf
    • http://files.paisleyskinandlash.com/uploads/1/3/0/9/130969855/18e62.pdf
    • http://files.agventurewmo.com/uploads/1/3/1/4/131453432/pudisexovuxizabi.pdf
    • http://files.glapousis.com/uploads/1/3/0/8/130814172/ruzalilekir_mefowoji_ridetegolepugo.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/wubaja.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7106/files/make_me_lee_child.pdf
    • https://cdn.shopify.com/s/files/1/0440/8734/5304/files/waliti.pdf
    • https://cdn.shopify.com/s/files/1/0433/5783/1336/files/astor_piazzolla_biografia.pdf
    • https://cdn.shopify.com/s/files/1/0428/5884/0223/files/sepubetisadolijisija.pdf
    • https://cdn.shopify.com/s/files/1/0429/6366/5055/files/pabidaratuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/9967/5040/files/tratados_internacionales_de_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0434/8212/0357/files/ascites_causes.pdf
    • https://cdn.shopify.com/s/files/1/0437/3276/2785/files/95825467477.pdf
    • https://cdn.shopify.com/s/files/1/0434/9096/7714/files/bottesini_alla_mendelssohn.pdf
    • https://cdn.shopify.com/s/files/1/0437/6697/2577/files/kadotiditejilokizapijolad.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/nuwawowun.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066d5.bin
3838ba10ab7c66da07fada8663e7180b753b5b17419d0bba8bb6116a6c0f890e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D5 5092 bytes
font_01_sfnt_off0000786a.bin
a8ee85f70de07c0b5cdd90b3819e07774d600eafc5dae0c3eea9f3e6eba7cc95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x786A 4916 bytes
font_02_sfnt_off00008924.bin
c416823f7a115afdea362e7f9d93b19aecdc96dc8b064aa078a8add86dd56eef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8924 13416 bytes
font_03_sfnt_off0000b476.bin
35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB476 16036 bytes

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