Malicious PDF — malware analysis report

Static analysis result for SHA-256 50593b148acba763…

MALICIOUS

PDF

40.7 KB Created: 2020-08-18 13:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91dc77aab964266299dd480aeb77b101 SHA-1: 4ab663f081203047549b8ac0dc8d98e628668218 SHA-256: 50593b148acba76381fcff0872376409f9cdc98d24275b467f41684c2539729e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a mass of external links, including one pointing to a known malicious redirector at 'https://ttraff.cc/pify?keyword=astrill+vpn++android'. This suggests a phishing or scam attempt, likely using the 'Astrill VPN' keyword to lure victims. The document body is heavily obfuscated but contains the same URL, reinforcing the malicious intent. No scripts were extracted, limiting further analysis of the payload.

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.cc/pify?keyword=astrill+vpn++android
    • http://zofagot.reginoguitars.com/uploads/1/3/1/3/131382406/lulofami.pdf
    • https://cdn.shopify.com/s/files/1/0434/4843/4840/files/15160695984.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/36955524485.pdf
    • https://cdn.shopify.com/s/files/1/0432/1184/9890/files/chronic_kidney_disease_malaysia_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0438/0344/3361/files/xipunuzakuretim.pdf
    • https://cdn.shopify.com/s/files/1/0430/1484/8671/files/12988829898.pdf
    • https://cdn.shopify.com/s/files/1/0436/6431/0425/files/zilusalokamirazele.pdf
    • https://cdn.shopify.com/s/files/1/0431/2314/6906/files/change_file_to_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/ganabafin.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0945/files/58330585564.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7829/files/garenarorad.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/juminoxenoxirade.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_off000060d6.bin
0c37210ac1fd6d0d5b2e7f49899e4fca0c2e0098a641908491f4e76990f1715e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D6 5000 bytes
font_01_sfnt_off000071dd.bin
75fedceb68330e1c181b3e8b5122ee7960257ba56ef3110b095698814f0a9b82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71DD 10556 bytes

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