Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f926eb6cd7c71dd…

MALICIOUS

PDF

38.4 KB Created: 2020-08-26 21:33:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e22136fdebfb9937332340ab9c7e1b4 SHA-1: 035331f92e6f2b9d9879262aefd951382a8249dd SHA-256: 8f926eb6cd7c71dd7a530aedfcbdffdfdd08679be880ebf82db867cae7b0c090
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.001 Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/pify?keyword=yandex+mp3+d%25C3%25B6n%25C3%25BC%25C5%259Ft%25C3%25BCr%25C3%25BCc%25C3%25BC'. This URL is likely used to redirect users to a malicious site for phishing or malware delivery. The document also contains a large number of embedded URLs, many hosted on Shopify, which is characteristic of SEO poisoning or link farm techniques to obscure the final 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.link/pify?keyword=yandex+mp3+d%25C3%25B6n%25C3%25BC%25C5%259Ft%25C3%25BCr%25C3%25BCc%25C3%25BC
    • http://files.dandytimevacations.com/uploads/1/3/1/3/131379296/442154.pdf
    • http://files.moannasworkroom.com/uploads/1/3/2/6/132681796/gopitowi.pdf
    • http://tawazuti.creativedesignconcepts.biz/uploads/1/3/1/4/131483083/30bd97a0.pdf
    • https://cdn.shopify.com/s/files/1/0431/4755/9067/files/20932268833.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7097/files/puxezaratifutino.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/65710230955.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sebifoxof.pdf
    • https://cdn.shopify.com/s/files/1/0437/0087/9510/files/xudirujudonokesemajalu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/18168325659.pdf
    • https://cdn.shopify.com/s/files/1/0432/4088/2343/files/nivoramidapabezulirite.pdf
    • https://cdn.shopify.com/s/files/1/0437/3364/7525/files/john_deere_33_tiller_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/counterintelligence_awareness_and_reporting_training.pdf
    • https://cdn.shopify.com/s/files/1/0437/6779/1765/files/bholi_si_surat_hd_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0457/6087/2604/files/vegoxikinupud.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_off000053b4.bin
40435a1ff618686bce43e043d83364618f743d85b585a2b7db5253aa7eb9b16d
pdf-font-stream PDF embedded font (sfnt) at offset 0x53B4 5708 bytes
font_01_sfnt_off00006686.bin
730ad35b0d97988622e6c81bab3e9268ad51202d22692957cf2aba34b0bcf839
pdf-font-stream PDF embedded font (sfnt) at offset 0x6686 11720 bytes