Malicious PDF — malware analysis report

Static analysis result for SHA-256 7522e0221a808c3b…

MALICIOUS

PDF

50.9 KB Created: 2020-08-19 01:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3257da5c3a4e04b760d985baf156c49 SHA-1: b2e4842ed6e9379f52ad2bd00be0a677f4cd9a3e SHA-256: 7522e0221a808c3b8ae9cefae936c443c89ac83903e26a2808a88c9d1b952e8e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent link directs to a known malicious redirector. While no scripts were extracted, the presence of numerous links and the malicious redirector strongly indicate an attempt to lead the user to harmful content, likely for phishing or malware distribution.

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=asfixia+perinatal+pdf+medigraphic
    • http://files.wavelengthspsychology.com/uploads/1/3/2/7/132740327/9f68d.pdf
    • http://muzugak.suninsag.com/uploads/1/3/1/4/131409310/mimumuvuwib_sukuwap.pdf
    • http://files.dennisnealvaughn.com/uploads/1/3/1/3/131383045/8310599.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0439/5106/3195/files/xuzerikodo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9745/6801/files/fevobenatiwe.pdf
    • https://cdn.shopify.com/s/files/1/0435/5781/4431/files/bacterial_wilt_tomato.pdf
    • https://cdn.shopify.com/s/files/1/0435/4405/1871/files/udhr_article_19.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/65141289695.pdf
    • https://cdn.shopify.com/s/files/1/0429/7300/3935/files/87585134671.pdf
    • https://cdn.shopify.com/s/files/1/0430/2661/2378/files/stored_procedure_in_sql_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4985/files/gisulovojilusizewamejivu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/nursing_head_to_toe_assessment_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/5274/4356/files/sobebajubenup.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5329/files/qaseeda_burda_shareef_dawateislami.pdf
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/73211192885.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xaxigeruver.pdf
    • https://cdn.shopify.com/s/files/1/0433/9931/5610/files/5e_bladesinger_scag.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_off00006fe3.bin
edc6b648a13ba0070ec04687a7906b678e9f28dca5dd11f93d85544dfbfbec85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE3 5304 bytes
font_01_sfnt_off000081ba.bin
1dffaea3bdbe000e5261bdee71af9159d4cfbef281bb5c2d87604622c7aa5601		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81BA 14484 bytes
font_02_sfnt_off0000ae9b.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE9B 4324 bytes

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