Malicious PDF — malware analysis report

Static analysis result for SHA-256 370c03e626d892ea…

MALICIOUS

PDF

55.3 KB Created: 2020-08-25 01:40:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8987e25a7b5a29fb79bd2aa54adbd4dd SHA-1: 472153caf7cb4c67e6371c47beaade00951b09dd SHA-256: 370c03e626d892ea41c7158cfc9d48f8e8b2623955269bdaa505bcd43d554452
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'airserver full crack' and the malicious URL, indicating a lure for cracked software. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a link to malicious infrastructure, and the PDF_SEO_LINK_FARM heuristic suggests a large number of outbound links, typical of SEO poisoning or link farm abuse to mask malicious activity. The primary intent appears to be redirecting users to the malicious URL for further exploitation.

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=airserver+full+crack
    • http://files.midlothianart.academy/uploads/1/3/1/4/131483184/f46aa323e1f3.pdf
    • http://files.roeslesportsconsulting.com/uploads/1/3/1/4/131406610/eb20fccb0ecf1c5.pdf
    • http://files.ecmstudy.com/uploads/1/3/2/7/132711947/8d7668123d.pdf
    • https://cdn.shopify.com/s/files/1/0435/1619/9066/files/deutsch_aufgaben_1._klasse.pdf
    • https://cdn.shopify.com/s/files/1/0437/9174/5185/files/wevoson.pdf
    • https://cdn.shopify.com/s/files/1/0428/8980/5983/files/nipufaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9977/4364/files/burmese_days_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/0250/9987/files/frp_bypass_apk_samsung_2018.pdf
    • https://cdn.shopify.com/s/files/1/0466/4947/5237/files/xowevunutomu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/metegemekipezafekude.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/77580222310.pdf
    • https://cdn.shopify.com/s/files/1/0431/0279/7986/files/70968866909.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000855c.bin
8408a7f1ab0830c66fe24c3b62e968558c39ea2901aeb356e8c35acae65003e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x855C 4576 bytes
font_01_sfnt_off000094f5.bin
90f35dad4e852e5f8b79a03a9c12d259fff4e2a1fdfb1217097baa87dff9cccd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94F5 14452 bytes
font_02_sfnt_off0000c23a.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC23A 4324 bytes

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