Malicious PDF — malware analysis report

Static analysis result for SHA-256 18c5c788d21cce81…

MALICIOUS

PDF

45.9 KB Created: 2020-08-22 17:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ad62a0830bd1ea04c4b544ab4344bcf2 SHA-1: a1d26499c22a20bd38db0978aa026313881e25d3 SHA-256: 18c5c788d21cce81a89e2024a5e25e9ffa231a4c59584e6206d1d89ff830146d
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to an SEO redirector infrastructure (ttraff.ru) that is known to host malicious content. The document body text and heuristics indicate a lure related to 'copy google sheet to another sheet', suggesting a phishing or scam attempt. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' further suggests an attempt to trick the user into executing commands, potentially to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.ru/pify?keyword=copy+google+sheet+to+another+sheet In PDF document text
    • http://files.victoria13gla.ca/uploads/1/3/0/7/130776060/rutedigasefo_ripekinal.pdfIn PDF document text
    • http://jowal.artaxlaw.com/uploads/1/3/0/8/130874493/garukuvoxapuda.pdfIn PDF document text
    • http://files.thecuriouscatgiftshop.com/uploads/1/3/2/6/132681596/puwakir.pdfIn PDF document text
    • http://files.sparkfoundation.ca/uploads/1/3/2/8/132814371/970ad44f5df489.pdfIn PDF document text
    • http://files.aiselementary.com/uploads/1/3/2/7/132740408/winaxipigogiwi-rudemul-welolafabin-jafuzifepifun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1161/2572/files/defavifogelifozugewosefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/nodekagizolekedamoketutar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9675/2534/files/57228771461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2184/3106/files/adding_fractions_worksheets_grade_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/45985005068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/dusuzij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8574/9654/files/13186010257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/xerefukovinifibut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6866/0643/files/mizubexiwap.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CC 4944 bytes
SHA-256: 121ac69480afa0a7a842aee86cf3ab91765e634011f4da9b29570b86c5e76b3f
font_01_sfnt_off0000729f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x729F 13044 bytes
SHA-256: 91bd9c768a4925f0b88c24cbe10eb9b84ea2f13fa9fa2c699312a35ba55d0913
font_02_sfnt_off00009c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C84 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333