Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae0f3894a522dc81…

MALICIOUS

PDF

40.7 KB Created: 2020-08-20 19:06:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9fcde0bf3dc14e26726e42fbf737338 SHA-1: 14229eb19de578554fbd559234198bf4460093aa SHA-256: ae0f3894a522dc815a0cccee62a5383539650ed567356f4f09969b06ce74644d
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though partially corrupted, contains the same redirector URL. This suggests the primary intent is to lure users through a series of redirects to a malicious destination.

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=is+cataract+surgery+performed+by+laser
    • http://sepamiz.commonwealth-cleaners.com/uploads/1/3/2/6/132681352/b45c4b9d.pdf
    • http://files.personalspaceproject.com/uploads/1/3/2/7/132740343/piwepapefa-kavijabojexopi-fuwuwumewa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/45470744794.pdf
    • https://cdn.shopify.com/s/files/1/0431/7616/5536/files/mesotugijariwowugimeg.pdf
    • https://cdn.shopify.com/s/files/1/0436/9163/8934/files/ssh_config_multiple_hosts.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3141/files/kitchen_vocabulary_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/1360/3491/files/gta_san_andreas_aptoide.pdf
    • https://cdn.shopify.com/s/files/1/0438/4771/2928/files/53250305175.pdf
    • https://cdn.shopify.com/s/files/1/0437/7011/8306/files/role_of_government_in_entrepreneurship_development_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0431/3530/3831/files/alveolos_pulmonares.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_off000058a5.bin
0627fcb580e857758dc6950a6e45274143eced546a3ba45e37578831f4947db6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58A5 5656 bytes
font_01_sfnt_off00006bc1.bin
5f475a8cc1d772e42ef2038965667741857b5c5b56db31e32dabeee5eb81b632		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC1 12552 bytes

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