Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e1f26d53863d00…

MALICIOUS

PDF

33.8 KB Created: 2020-08-19 20:40:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f2fc5d08e71471d3d61abea2723efe1 SHA-1: 7e2fede8e292aac017427484583491904447f3f8 SHA-256: 85e1f26d53863d00e70d7c0ef1575f101a54ac724fa67b41c70f147d7d503f5e
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.ru. The document body, though heavily obfuscated, contains the same URL and references a 'provider change form', suggesting a phishing lure. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify, likely for SEO poisoning or to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=amerihealth+caritas+provider+change+form
    • http://jomatofa.cardiffmetcricket.com/uploads/1/3/0/7/130740510/nuxufopopixelegijadi.pdf
    • http://files.mrslorenzscience.com/uploads/1/3/2/6/132681826/762982.pdf
    • http://files.jonathancrobinson.com/uploads/1/3/0/7/130775983/legobafel-fafifodemita-fafilesipekuz.pdf
    • http://files.pixlfurniture.com/uploads/1/3/2/6/132682235/zasefivegudobibe.pdf
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/24120073433.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1634/files/roxinijosebedizekobegubum.pdf
    • https://cdn.shopify.com/s/files/1/0430/1779/7785/files/mizatuxobido.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6071/files/bifepekusifaliwidizulep.pdf
    • https://cdn.shopify.com/s/files/1/0433/8312/8214/files/romisulilid.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/contract_closeout_report_definition.pdf
    • https://cdn.shopify.com/s/files/1/0435/6685/8408/files/peraneduvam.pdf
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/english_grammar_in_use_elementary_supplementary_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0436/1197/9939/files/assistive_technology_in_the_classroom_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/0864/7580/files/71956120454.pdf
    • https://cdn.shopify.com/s/files/1/0438/1625/5645/files/88036991122.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_off00004846.bin
3b01e74c47e52dbe7e472c38f33505a9f9faf2d902b920e8e425d4c304d22f5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4846 5620 bytes
font_01_sfnt_off00005b39.bin
654fa3a3681b339d8b8b8dc378b198a1ab7ec85ccc0fb30a22716e4b3313f989		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B39 9044 bytes

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