Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db5999c6b96a137…

MALICIOUS

PDF

44.7 KB Created: 2020-08-01 00:14:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84478b9649dd236b4867b9bba479aff9 SHA-1: b1c422444886c09aca54d54f41b13ee1f0977ed4 SHA-256: 6db5999c6b96a137dee34bdf0fadbb0dc85ae4e9bd58e1076612613871ce0b79
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to Shopify domains, forming a link farm. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.cc/pify?keyword=vortex+race+3`. This suggests the document is designed to lure users to malicious sites, likely for phishing or further malware delivery. No scripts were extracted from this sample.

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=vortex+race+3
    • http://files.precisionpitching.net/uploads/1/3/1/3/131379110/bd97a6586c.pdf
    • http://files.clonmel-acupuncture.com/uploads/1/3/1/1/131163740/3235035.pdf
    • http://files.biographyofanobody.ca/uploads/1/3/1/6/131637658/1253665.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/76096989673.pdf
    • https://cdn.shopify.com/s/files/1/0428/1552/0935/files/xexejagujosizifuwipu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kozaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/zunijimipinifebome.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5089/files/82420224026.pdf
    • https://cdn.shopify.com/s/files/1/0431/4012/0733/files/tiwajuxevoligazigatuzum.pdf
    • https://cdn.shopify.com/s/files/1/0437/4193/7818/files/tukonofava.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mojijemorewowasimagaxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1146/files/nefiwigekufudipiligawun.pdf
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/37635461326.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/zikiwiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/60910173853.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9635/files/rijirumifigubikawemawi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7850/6904/files/13297079498.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065f6.bin
fa7002459c921d221c779465a563528c44dce788b0578f5388ebc493c27eddf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F6 4412 bytes
font_01_sfnt_off000074ff.bin
66a898154ef204d62658722e1a100ee1ea8f3e9bf743e41199424035b34f6f12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74FF 10052 bytes
font_02_sfnt_off0000977f.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x977F 4324 bytes

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