Malicious PDF — malware analysis report

Static analysis result for SHA-256 31ecdd96fd56cb51…

MALICIOUS

PDF

50.2 KB Created: 2020-08-03 09:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dd02efb684480e29e148c3911de39c2 SHA-1: 0fb6da6287358183de8c33b84b0ad098f3ae628c SHA-256: 31ecdd96fd56cb51052909e3eb5cb0cbfd1a63d66a1b60682ca5d5e826fca898
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains the URL 'https://ttraff.ru/pify?keyword=dark+mode+high+sierra', which is identified as a malicious redirector. The presence of numerous embedded links, many pointing to Shopify domains but also including other suspicious domains, suggests a campaign to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=dark+mode+high+sierra
    • http://files.sallyrothchildceramics.com/uploads/1/3/1/4/131409037/3439854.pdf
    • http://files.luke4-18ministries.org/uploads/1/3/1/3/131384643/jadelixugopidud.pdf
    • http://files.drawtastic.org/uploads/1/3/1/4/131438899/meparurin.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/24932539957.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7904/files/pawexozo.pdf
    • https://cdn.shopify.com/s/files/1/0438/9850/3336/files/25851149356.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/gorinuzakiw.pdf
    • https://cdn.shopify.com/s/files/1/0441/3492/4440/files/gipedawasopejo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8372/files/49035321884.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/7106681037.pdf
    • https://cdn.shopify.com/s/files/1/0430/2589/1479/files/zazerosuzegixesab.pdf
    • https://cdn.shopify.com/s/files/1/0438/8998/3640/files/dual_boot_windows_10_and_arch_linux.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/15173602942.pdf
    • https://cdn.shopify.com/s/files/1/0429/0579/6774/files/37678566506.pdf
    • https://cdn.shopify.com/s/files/1/0432/5320/3102/files/wiwuvuseregolenepopekajaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/8176/0935/files/xixifizoki.pdf
    • https://cdn.shopify.com/s/files/1/0431/5414/5444/files/46181377118.pdf
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/merakelizafuluwapejos.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063f2.bin
8fa5fc47f1c4d577ade0a12cf104f8d2f5d8331d2d553a120b9eeba46afd7401		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F2 6168 bytes
font_01_sfnt_off00007394.bin
a1c74a5a006a58d3ea905b83ec431ecef8de57412a92a4bcd88d8fed0d99b8b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7394 4872 bytes
font_02_sfnt_off0000841e.bin
58a2aac803129336530ccb2ff27eae2beea50144af1c60fa86ddb0edd61b1516		 pdf-font-stream PDF embedded font (sfnt) at offset 0x841E 14836 bytes
font_03_sfnt_off0000acc7.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACC7 4324 bytes

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