Malicious PDF — malware analysis report

Static analysis result for SHA-256 f82e2120d276dcbd…

MALICIOUS

PDF

42.7 KB Created: 2020-10-05 20:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 47dad1623dda2a301ee72756923c9b53 SHA-1: fa866e01e7fe53c0c577565cfb95e65b9ac375b6 SHA-256: f82e2120d276dcbdcbceb8d7503ea40aa44c32c6eb2a41f4be4e3eaa8359bab1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure. The document body text, though heavily obfuscated, includes the URL 'https://cctraff.ru/pify?keyword=movie+review+terms', suggesting a lure to a malicious site. The presence of numerous other PDF links, many hosted on strikinglycdn.com, indicates a link farm designed to distribute 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://cctraff.ru/pify?keyword=movie+review+terms In PDF document text
    • http://files.bigyogaonline.com/uploads/1/3/2/8/132815793/36d455003b10.pdfIn PDF document text
    • http://files.bayviewrehab.com/uploads/1/3/0/7/130738814/movogafaguxo-bevaxuba-kepapupija-ditat.pdfIn PDF document text
    • http://wifurez.kingstonwestdental.ca/uploads/1/3/0/9/130969963/4a61a8ffdf0e26.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f366d5c6-73fd-4da4-bb8a-533a71ed5369/61533603096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c318747f-08c6-421d-b0ec-9c0bee1ef05e/nivorozoreketi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aec8598-b242-4b58-b90b-e4764c7a8b65/49364630048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b96a7bf-e6ab-481b-bb07-a94e30d94699/jetel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6963/1385/files/apex_legends_system_requirements_can_i_run_it.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8313/9739/files/julopebelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9212/3041/files/the_royal_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf1f1176-f23a-4c7f-980f-aa97f0cef45e/xijozepedal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/139d5939-548b-4c57-bc6c-0f7f867c504f/tobewirexakesab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72848425-b08f-47fa-9a44-60834d9c5110/sikonoxumibigivajudojeli.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFC 4744 bytes
SHA-256: a085d9bf1d117538839dd974edbb16b541c0735aaf0c2df7926c7bfffe257696
font_01_sfnt_off00007c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2B 10060 bytes
SHA-256: 6a29a52039f2afc661023bdbe8f509d946b2689d28c8602792fa1e6c65fac84c

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