Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dfdb08017b2fe69…

MALICIOUS

PDF

37.4 KB Created: 2020-08-13 02:38:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 318c09dae753f896a6f68e14301c6fd1 SHA-1: 42e7483ebd308552f0508f8ce2fbdd422f89f552 SHA-256: 2dfdb08017b2fe69a4d86162c5bf9a017af157b73505a16dc8a9390a1fbdf0ea
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text referencing a "breadman plus tr 700 manual pdf" and the malicious URL, suggesting a lure for users seeking this manual. The ML classifier also strongly indicated maliciousness. The numerous links to Shopify PDFs, while mostly benign, are part of a link farm strategy to improve search engine ranking for the malicious content.

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.com/pify?keyword=breadman+plus+tr+700+manual+pdf
    • http://files.lwmphotography.co.uk/uploads/1/3/1/4/131410685/kukitifizija.pdf
    • http://ribaxed.chassepermanentmakeup.com/uploads/1/3/1/6/131636655/wimiluroperifogafa.pdf
    • http://files.theinnerstrengthlife.com/uploads/1/3/2/3/132303229/6546103.pdf
    • http://files.mytpnoa.com/uploads/1/3/0/7/130775639/munuwamen.pdf
    • http://files.chilovebooks.com/uploads/1/3/1/6/131606262/voriresa_ditixazavumoko.pdf
    • https://cdn.shopify.com/s/files/1/0439/0230/4408/files/92117215496.pdf
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/pebewovifa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3595/0241/files/68997471028.pdf
    • https://cdn.shopify.com/s/files/1/0433/0926/9156/files/8430043557.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/viziwevomenemuxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/5720/9753/files/bojulufemuzegol.pdf
    • https://cdn.shopify.com/s/files/1/0455/6773/8021/files/four_pronged_approach_in_developmental_reading_2.pdf
    • https://cdn.shopify.com/s/files/1/0434/0963/7533/files/pakuleresesemofemokabera.pdf
    • https://cdn.shopify.com/s/files/1/0428/9223/0823/files/43720253260.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0357/files/37026133149.pdf
    • https://cdn.shopify.com/s/files/1/0428/6224/8095/files/saints_row_4_character_creations.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/50051627954.pdf
    • https://cdn.shopify.com/s/files/1/0433/8669/9925/files/53586761081.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_off0000536b.bin
824badc734b41211501cedff97d9ce64ccd8f524d7f32db420d96b112370aa7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x536B 5460 bytes
font_01_sfnt_off000065e6.bin
1e6109905f98092f1263775707f641f65e4f705c6ba009197047c82a1241eac9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65E6 10260 bytes

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