Malicious PDF — malware analysis report

Static analysis result for SHA-256 722612472df39b51…

MALICIOUS

PDF

49.0 KB Created: 2020-08-10 17:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d735aae7142c38b1ae702c46ea1628b SHA-1: c3750fb2817045282f7adc80251ba5c483fb1d16 SHA-256: 722612472df39b51ef455960389d5abff40410f56a95233c7a3abd70a07f59fa
154 Risk Score

Malware Insights

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

The PDF contains a lure related to a 'community pharmacist job description' and embeds numerous links. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=community+pharmacist+job+description+pdf'. The ML classifier also strongly flagged this PDF as malicious. The presence of many external PDF links suggests an attempt to distribute further content or redirect users to malicious sites.

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.cc/pify?keyword=community+pharmacist+job+description+pdf
    • http://files.susanrlawrence.com/uploads/1/3/2/7/132740405/9320225.pdf
    • http://files.sdundiagnosedsupport.com/uploads/1/3/0/9/130969826/fokulekuj.pdf
    • http://genel.saraviniar.com/uploads/1/3/2/6/132683071/aadc3d91dc7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/xufobexotixarata.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/nudafobidarutisej.pdf
    • https://cdn.shopify.com/s/files/1/0434/8959/1461/files/precalculus_with_limits_a_graphing_approach.pdf
    • https://cdn.shopify.com/s/files/1/0445/3348/1636/files/best_love_poems_of_all_time.pdf
    • https://cdn.shopify.com/s/files/1/0432/3174/0066/files/dukiviwejuzokuvilegux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25346701784.pdf
    • https://cdn.shopify.com/s/files/1/0431/1796/9570/files/78667962906.pdf
    • https://cdn.shopify.com/s/files/1/0438/3624/4118/files/37407667624.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5882/files/ditudanukidoma.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/gonejen.pdf
    • https://cdn.shopify.com/s/files/1/0434/6285/2761/files/gujarati_bible_in_format.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007359.bin
aa8b42523e1ca65d483f4216d8d56652d0a09cb1dc9ce5f97774fe8dd59c95f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7359 5584 bytes
font_01_sfnt_off00008626.bin
195537bcfe753b26a9ab7d668357d2e7d81af6e642188fa8c37375aa5045c3ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8626 10144 bytes
font_02_sfnt_off0000a8dd.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8DD 4324 bytes

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