Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e507fe07280d8f…

MALICIOUS

PDF

44.4 KB Created: 2020-08-06 22:28:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f9264eda29d16e7c0710ce4ef066ef9 SHA-1: b927e779e0dd85f5ceea8e3b3e3f03de86447a3e SHA-256: 08e507fe07280d8fb71f7846fb374a2baacc411117c1682e104cd9b0a2cb0785
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier output strongly indicate malicious intent. The document body, though heavily obfuscated, contains the URL that triggered the redirector heuristic, suggesting a lure to external content. No scripts were extracted from this sample.

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=bemanningsavtalet+2020+pdf
    • http://files.parvathyprem.com/uploads/1/3/2/6/132695418/zefafo_kuzikamofamapit_majisututurufa.pdf
    • http://files.jackiedennison.com/uploads/1/3/1/0/131070195/pomukotegenomi-tikep.pdf
    • http://files.northwoodsgourmetgirl.com/uploads/1/3/2/6/132682040/zosev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4550/2626/files/gevek.pdf
    • https://cdn.shopify.com/s/files/1/0434/5698/7303/files/29915606354.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8453/files/2013_ford_fusion_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/fundamentals_of_thermodynamics_borgnakke.pdf
    • https://cdn.shopify.com/s/files/1/0433/1955/8299/files/84894209615.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/tapumamamukezob.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7070/files/romotitamorifemu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/dell_inspiron_1545_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/nikosodazowolelupok.pdf
    • https://cdn.shopify.com/s/files/1/0435/8009/6667/files/4.pdf
    • https://cdn.shopify.com/s/files/1/0435/5584/8355/files/83105794401.pdf
    • https://cdn.shopify.com/s/files/1/0430/2028/8153/files/betifonusimovanuke.pdf
    • https://cdn.shopify.com/s/files/1/0430/7232/3737/files/sekonic_l-_308s.pdf
    • https://cdn.shopify.com/s/files/1/0430/7851/6885/files/wakojosizogixamadag.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ed8.bin
9c6eb2863786afbc65d8458d51ae759111ae4cb95d605eda45f2274d39836caf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED8 5648 bytes
font_01_sfnt_off00008212.bin
6db3fe59dee67b9ab378e6c4bffda44c07bc9af32aeeec3f71eb0ef06c5301b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8212 10444 bytes

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