Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d380feaaf2ee438…

MALICIOUS

PDF

42.8 KB Created: 2020-08-06 20:16:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb2e8292672b30de4b429ea284c69324 SHA-1: e37b7d02683c411b1cd869f1990e00b5b9bf2c04 SHA-256: 9d380feaaf2ee438c55a058e62c4514e9b4da4d24393cfce5e1911945a7ad3f2
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests the document is designed to lead users to malicious infrastructure, likely for phishing or malware delivery. The ML classifier strongly supports the malicious verdict.

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/wb?keyword=nutricion%20enteral%20y%20parenteral%20enfermeria%20pdf
    • http://files.regionfiveadulted.com/uploads/1/3/0/7/130739239/e50b22755.pdf
    • http://files.highaltitudecloggers.com/uploads/1/3/2/6/132681976/zupovutasuza.pdf
    • http://files.toltc.com/uploads/1/3/0/7/130775752/moxogifag_liwunapewor_towukolod_pukopekoj.pdf
    • http://files.lauralorenz.com/uploads/1/3/1/4/131437532/geramabejanimi.pdf
    • http://files.njromancewriters.org/uploads/1/3/1/6/131606046/1945893.pdf
    • https://cdn.shopify.com/s/files/1/0433/1392/2206/files/garupelufamexebojaruva.pdf
    • https://cdn.shopify.com/s/files/1/0437/3469/6097/files/carl_jung_analytical_psychology.pdf
    • https://cdn.shopify.com/s/files/1/0431/5050/8181/files/past_tense_worksheets_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0437/8443/7922/files/single_variable_calculus_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/7012/7254/files/zemiwosegisit.pdf
    • https://cdn.shopify.com/s/files/1/0434/6963/5734/files/97850624262.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/2998/files/28900769599.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/23619396701.pdf
    • https://cdn.shopify.com/s/files/1/0440/7197/7110/files/kawasaki_bayou_300_service_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/8533/8526/files/werete.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/malakexero.pdf
    • https://cdn.shopify.com/s/files/1/0437/1120/1435/files/46741285377.pdf
    • https://cdn.shopify.com/s/files/1/0433/8011/3562/files/brockhaus_and_efron_encyclopedic_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0429/0953/2316/files/93592676528.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_off00006658.bin
4721615897fc1f90e269b807422c85d5ff3d143ddd04cbc94955e608d5d62424		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6658 5192 bytes
font_01_sfnt_off00007802.bin
f0f5e33e23b02adf2d4132ffa31041bfe83e276e8c19cf88811ffd5bd5efccec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7802 11164 bytes

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