Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb97deba6a05557…

MALICIOUS

PDF

46.0 KB Created: 2020-08-11 22:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a1327a4a61db531a3142b36626beff0 SHA-1: 58d92b8100713bc5e30ad9aeac4ce9e8c6524675 SHA-256: deb97deba6a05557573d2951210b968ddde65a3c22164a1026f375cb8c42a7d7
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 pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Mappa attrazioni budapest pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly flagged this PDF as malicious.

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=mappa+attrazioni+budapest+pdf
    • http://files.pendulumhealing.com/uploads/1/3/2/3/132302824/zelidunisipo-pebuw.pdf
    • http://files.bhavanavaishnavi.com/uploads/1/3/1/6/131606208/f9be5dee14a36ba.pdf
    • http://files.mag-instruments.com/uploads/1/3/1/1/131164440/mubekibedizi.pdf
    • http://files.daretodiyoc.com/uploads/1/3/0/7/130775518/6e8a7d270cff42.pdf
    • http://files.theexpatspeechie.com/uploads/1/3/2/3/132303322/jilirabirewumop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vaxopegi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1945/3095/files/95433204731.pdf
    • https://cdn.shopify.com/s/files/1/0431/3117/5063/files/fixajexurepidodalefu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3582/0185/files/95638469585.pdf
    • https://cdn.shopify.com/s/files/1/0430/3273/9989/files/jakusapemonipiruw.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/c_programming_books_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/2002/files/poxixuwikoxe.pdf
    • https://cdn.shopify.com/s/files/1/0435/5915/7921/files/sanig.pdf
    • https://cdn.shopify.com/s/files/1/0437/8427/4069/files/bharatha_rajyangam_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/bogumili_knjige.pdf
    • https://cdn.shopify.com/s/files/1/0437/4275/7029/files/18120108519.pdf
    • https://cdn.shopify.com/s/files/1/0437/2496/3990/files/berokipotepexamu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0300/1502/files/volaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/0451/0887/files/tegapevifu.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_off000076ce.bin
fcd250e97cd9fd655d929090b1dca609e8921c69b8347398596f2c6622f6f8c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76CE 5200 bytes
font_01_sfnt_off00008887.bin
05f9a9aa796910f1bd01a3d1ae81e9fbc42ebf1209645d1c36fae858d205f3e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8887 10084 bytes

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