Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b5be22f1795e93…

MALICIOUS

PDF

53.1 KB Created: 2020-08-21 22:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e97375988b54b9f0f93d6f1426e967f3 SHA-1: 7e7a5072581331ec1acd5b65c2ed3fca5aae8f02 SHA-256: 01b5be22f1795e935e130c4d9b32cb9b94a6fadcf362a7cc87faad485e905207
154 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL https://ttraff.cc/pify?keyword=attendance+sheet+sample+for+employee. The document's content, though partially corrupted, includes this malicious URL and numerous other links to PDF files hosted on Shopify, suggesting a tactic to obscure the malicious redirector. The ML classifier strongly indicated maliciousness, and the presence of embedded links points towards a phishing or redirection attack.

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=attendance+sheet+sample+for+employee
    • http://gapoto.redwood4h.org/uploads/1/3/0/9/130969525/nanuva_xofol_zurobuxelupete_jodidabitito.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9085/4566/files/18436922937.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/14163877606.pdf
    • https://cdn.shopify.com/s/files/1/0430/2998/7489/files/44887594264.pdf
    • https://cdn.shopify.com/s/files/1/0449/3757/6603/files/business_essentials_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/6734/9923/files/5_1_practice_classifying_triangles_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/1705/1048/files/immigration_rules_appendix_fm_se.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0334/files/64095907315.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/92496834425.pdf
    • https://cdn.shopify.com/s/files/1/0431/8871/5682/files/71432889632.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000753b.bin
ee61cf8c9eacbe6e37e36a1c516818fd358240c842f887d2a86a48e6a3ca0939		 pdf-font-stream PDF embedded font (sfnt) at offset 0x753B 5484 bytes
font_01_sfnt_off000087b5.bin
c198a591ae584e5ce0ba4e9356ad643509fbd09026bb86d1b1e1e191a79662f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87B5 1596 bytes
font_02_sfnt_off00008fd6.bin
30ae8d64d8a43e856b2621be0198c6d4d680dd6023a64b8b485c2124a1b48c46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD6 9960 bytes
font_03_sfnt_off0000b214.bin
18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB214 16144 bytes

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