Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5f568a44ef58156…

MALICIOUS

PDF

45.6 KB Created: 2020-07-31 14:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbff0ac58a7238ccb3ee842dcb610647 SHA-1: 05d967aae21afc67f93ce77a94423e20099c9655 SHA-256: c5f568a44ef5815657fef55e30231f6fee07674152a5789e0f8e60f129b572ed
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file contains a large number of embedded links, many of which point to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure for a 'catalogue noel carrefour 2020 pdf'. The primary malicious activity observed is the redirection to external URLs, likely for further exploitation or credential harvesting. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=catalogue+noel+carrefour+2020+pdf
    • http://files.thelittleyellowbuilding.com/uploads/1/3/1/4/131437149/bekipudalitijazevevu.pdf
    • http://files.democraticclubofthewoodlands.com/uploads/1/3/1/4/131406751/21727ac.pdf
    • http://files.pixelsxblocks.com/uploads/1/3/2/8/132815872/7debf263.pdf
    • http://files.shadesofharmony.com/uploads/1/3/1/4/131409037/1899480.pdf
    • http://files.rmhsperformingarts.com/uploads/1/3/1/4/131407857/8718190.pdf
    • http://files.pixelsxblocks.com/uploads/1/3/2/8/132815872/7debf26
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/22084845114.pdf
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/35434142156.pdf
    • https://cdn.shopify.com/s/files/1/0430/6731/0231/files/24808094703.pdf
    • https://cdn.shopify.com/s/files/1/0434/2297/4117/files/todad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90262961418.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/volefate.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34515707504.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/viduzerodifuxulonagugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/47931367779.pdf
    • https://cdn.shopify.com/s/files/1/0439/5050/6152/files/wafewipo.pdf
    • https://cdn.shopify.com/s/files/1/0441/0041/9736/files/83475424921.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/53651426656.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/74516107249.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_off00007407.bin
ffd7f84cc863d2ce75704adcc2fc7b4a3e998bb439bd698c05db6a8b8e5628a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7407 5276 bytes
font_01_sfnt_off0000860c.bin
7c4893b579c0c356eef2312a6905b60bf69f8bd479a5f908e00106014f471dd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x860C 10088 bytes

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