Malicious PDF — malware analysis report

Static analysis result for SHA-256 4097836a0d8ae7c8…

MALICIOUS

PDF

42.9 KB Created: 2020-08-19 05:27:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c865209d05989cb4acff5641f8f4a407 SHA-1: b81bbe07eee82a80e7a55216e9fbab8e33e428b1 SHA-256: 4097836a0d8ae7c8146c23e9c01a781fb68da6c698a6a72ba6480c7a329fa6ca
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document exhibits characteristics of a link farm, embedding numerous external links, predominantly to PDF files hosted on Shopify. One of these links, specifically 'https://ttraff.com/pify?keyword=stipple+shading+brushes+illustrator', is identified as a malicious redirector. The presence of a large number of external links, combined with the malicious redirector, suggests an attempt to lure users to malicious content or infrastructure.

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.com/pify?keyword=stipple+shading+brushes+illustrator
    • http://juwovagu.hopesecondarylibrary.com/uploads/1/3/1/4/131406717/fotafupisalumel.pdf
    • https://cdn.shopify.com/s/files/1/0439/0453/2648/files/daparegebebor.pdf
    • https://cdn.shopify.com/s/files/1/0431/1855/9393/files/day_by_day_armageddon.pdf
    • https://cdn.shopify.com/s/files/1/0440/9550/4536/files/21043308714.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4936/files/chateau_de_versailles_histoire.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/22602138586.pdf
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/boeing_aircraft_performance.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6023/files/beginnings_chicago_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/6088/7705/files/pewape.pdf
    • https://cdn.shopify.com/s/files/1/0433/5055/6821/files/kepesopenozipefuremekunig.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_off00006703.bin
ce418fff6659ff1d84decae4c057ab1fb1febfc5ae655051f5acb4b347aed6e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6703 5464 bytes
font_01_sfnt_off00007974.bin
c594c6214b43c665783a10238b1418e05925ca30daacad0e06877ea401294e66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7974 10988 bytes

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