Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabba6e98f0c57bf…

MALICIOUS

PDF

41.8 KB Created: 2020-08-08 08:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bab356b71761caa53e8da8e26a81184 SHA-1: 1500f7ab494edd13ae754cabf30e3fb4200da329 SHA-256: eabba6e98f0c57bfc5c76f8510c2f4c9984c4f70440f4ec93e9cb38cb36a76db
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=adjectif+et+pronom+possessif+pdf'. While many other links point to benign Shopify domains, the presence of the malicious redirector and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful content. No scripts were extracted, and the document body is heavily obfuscated.

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=adjectif+et+pronom+possessif+pdf
    • http://files.oceanstatefollies.net/uploads/1/3/1/4/131453021/dejufotibix.pdf
    • http://files.randolphbush3.com/uploads/1/3/2/7/132711954/tusenupi.pdf
    • http://files.carolinedempseyartist.com/uploads/1/3/0/7/130740517/c4df59aedf56d.pdf
    • http://redute.tylercreekcamp.com/uploads/1/3/2/7/132740214/2dcfdb8.pdf
    • http://files.maiftrading.com/uploads/1/3/2/6/132681647/e3f45b48d.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/21408521823.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44603331863.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/manual_of_structural_kinesiology_18th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/1678/0956/files/preschool_classroom_management_150_teacher_tested_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0429/5576/7967/files/wibuwinogelivewafebagu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/18636836188.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/92803689430.pdf
    • https://cdn.shopify.com/s/files/1/0428/3170/8316/files/foboras.pdf
    • https://cdn.shopify.com/s/files/1/0431/6374/6466/files/neruberomovufelen.pdf
    • https://cdn.shopify.com/s/files/1/0428/7329/0908/files/67492561709.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/88302859297.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/resalitaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/3998/8648/files/40731647022.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_off000060d4.bin
77f2a89443a5166783dff55ba86dd43e06e70061e758abc148f822115df16253		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D4 5124 bytes
font_01_sfnt_off0000723b.bin
a7678d7d83788c64656e361eb3294b06af114610af8162a08218c04ae4ed8817		 pdf-font-stream PDF embedded font (sfnt) at offset 0x723B 12184 bytes

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