Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b3642552d7a943…

MALICIOUS

PDF

47.9 KB Created: 2020-08-14 06:40:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5f22b2b9432f40ff2938bb600ef5403 SHA-1: afc5ddce4ef4de742c26cad73f7691415aee5e79 SHA-256: 60b3642552d7a9436cf73ddc9fb72a81b19bd1e1b80e6a22abfdbd65030e1dfc
162 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=free+wedding+budget+spreadsheet+ideas, which is a known malicious redirector. This suggests the document is designed to trick users into visiting malicious sites under the guise of providing a useful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=free+wedding+budget+spreadsheet+ideas
    • http://zazidekeb.homefrontherald.com/uploads/1/3/1/4/131453329/dalexoko-wuwav-navozu.pdf
    • http://files.lenazavaroni.co.uk/uploads/1/3/2/6/132696483/boxirifenititogimawu.pdf
    • http://files.maltagozoholidays.com/uploads/1/3/0/7/130740440/komeximexejuxo.pdf
    • http://files.baddogarts.org/uploads/1/3/1/4/131453432/rajadijaja_junulaxikopila.pdf
    • http://files.destinyeve.com/uploads/1/3/1/3/131398046/xowamasine.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0443/2547/0364/files/clinical_pharmacy_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9892/2403/files/tibudofetaroxozexisax.pdf
    • https://cdn.shopify.com/s/files/1/0439/0486/0328/files/antibiotics_and_synthetic_antimicrobial_agents.pdf
    • https://cdn.shopify.com/s/files/1/0433/8080/1701/files/52241835094.pdf
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/25121231543.pdf
    • https://cdn.shopify.com/s/files/1/0433/2693/1099/files/anunnaki_livro.pdf
    • https://cdn.shopify.com/s/files/1/0433/6350/0197/files/talokupudovaposupebim.pdf
    • https://cdn.shopify.com/s/files/1/0430/6518/0314/files/39694832977.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/wawamamufufotijufekegipe.pdf
    • https://cdn.shopify.com/s/files/1/0432/9452/3552/files/62252698609.pdf
    • https://cdn.shopify.com/s/files/1/0439/9919/9390/files/princess_diaries_3_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/7189/6736/files/list_intersection_python.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b63.bin
c6deca327eefc692af415e8cf8444be468f5a94e5603737519edfc8d96142d33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B63 5376 bytes
font_01_sfnt_off00008db0.bin
7c6197f255f63f69a8080e858be0534b53bf1a7d514aca15f645143dcd3bf40e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB0 10580 bytes

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