Malicious PDF — malware analysis report

Static analysis result for SHA-256 d82a33b3a5ffee35…

MALICIOUS

PDF

47.9 KB Created: 2020-08-14 08:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3012ce92550a595f16e49131ca22a6bb SHA-1: 6899cc4950bbcc39778e261f8d6d51245cec5f22 SHA-256: d82a33b3a5ffee358fa8710cf75fe1b2c624c867a3311e90a9a7cb0b3fecd51a
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'Kindle book cover template psd' and the malicious URL, suggesting a lure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the presence of malicious redirector links, and 'PDF_SEO_LINK_FARM' indicates a large number of external links, many pointing to Shopify, likely for SEO manipulation or to host benign-looking content that masks the malicious redirector.

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=kindle+book+cover+template+psd
    • http://files.stmarkpreschoolcares.org/uploads/1/3/2/6/132682802/zotebazogud.pdf
    • http://romifo.burnbyequestrian.co.uk/uploads/1/3/1/4/131406381/lagofafiku_dojoponinuwedi.pdf
    • http://soluz.durrellodom.com/uploads/1/3/0/8/130874493/zumijal_nokulaz_lemukam.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5804/files/zepurorisavutomoto.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/business_model_generation_arabic.pdf
    • https://cdn.shopify.com/s/files/1/0431/7144/6939/files/93837117470.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5181/files/60125007439.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1072/files/29532982333.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6071/files/gagupudisodifiponigomaras.pdf
    • https://cdn.shopify.com/s/files/1/0437/7883/4586/files/tree_traversal_python.pdf
    • https://cdn.shopify.com/s/files/1/0437/9040/1685/files/96512393365.pdf
    • https://cdn.shopify.com/s/files/1/0440/7181/3285/files/41841405120.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/alimentation_entrale.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/kelewawe.pdf
    • https://cdn.shopify.com/s/files/1/0433/5842/1142/files/fusionner_en_une_page.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/
    • https://cdn.shopify.com/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c21.bin
7c77108824a43a45db06b6c2a6f7374d87c761bb1ea8b4a79dfcbd6225508e7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C21 5452 bytes
font_01_sfnt_off00008e7d.bin
1c5c5e49a5b8c9a1f03ea99c9cf1648d16de04af8196f575680d41760dfab9f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E7D 10524 bytes

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