Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b8cd648c817534b…

MALICIOUS

PDF

55.5 KB Created: 2020-08-29 21:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68b04a86c09c26b4585ecba96470f6fa SHA-1: a3c26e602ba20dcfabb6fd46badac62cce8a6298 SHA-256: 3b8cd648c817534b8919004367a0b1d22f968c023b19b7b4aa71905bfa517f1a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to a link farm hosted on cdn.shopify.com. One of the embedded URLs, https://ttraff.com/wix?keyword=the+hacker+walkthrough, is identified as a known malicious redirector. This suggests the document is designed to lure users to malicious websites through a network of linked content.

Heuristics 3

  • 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.
  • 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/wix?keyword=the+hacker+walkthrough
    • https://static.usrfiles.com/ugd/b8c837_671c8c852bd8412b8eb3fa29d4ddc315.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a5429fb92584a7bb02156c4b63fd2da.pdf
    • https://static.usrfiles.com/ugd/c0b427_30069f09a7584f56ab5233009b2f3905.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce3a433c7964429c889da22b82d5d1e8.pdf
    • https://cdn.shopify.com/s/files/1/0434/3198/5309/files/roblox_chromebook_os.pdf
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/nexikobobisugi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5743/9129/files/apk_blackberry_link_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/panduan_belajar_bahasa_inggris.pdf
    • https://cdn.shopify.com/s/files/1/0450/7946/2040/files/metabolic_syndrome_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/3840/6806/files/sensors_actuators_and_their_interfaces.pdf
    • https://cdn.shopify.com/s/files/1/0436/5369/3593/files/zigubotinetefil.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/
    • https://static.usrfiles.com/ugd/b8c837_671c8c852bd8412b8eb3f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009cc8.bin
0f42d99919a620d3808d062cd853605f48112e8e4f7fccefec225ff8de96978e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CC8 4988 bytes
font_01_sfnt_off0000adce.bin
77a06945e1d407de91552ae94d4f4a45dd99dd7fc3c02d3badc9f646f4113843		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADCE 10328 bytes

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