Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bc9f3567228b563…

MALICIOUS

PDF

54.2 KB Created: 2020-08-04 06:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5be98c4e872bad9de8da4d4f8168b6b SHA-1: e8cf7a45b2e8e0239ae2da1a103c723bac0b4e69 SHA-256: 8bc9f3567228b56346ccb892ba6cbb5fa294706e38a9c38f0774a8e900659ff7
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.cc', which is flagged as malicious. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking PDF title, suggesting a lure. The primary attack vector appears to be social engineering via a malicious link within the PDF.

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.cc/pify?keyword=lala+ramswaroop+ramnarayan+calendar+2020+pdf+download
    • http://files.beggslab.com/uploads/1/3/1/3/131383760/xakapemegojawutopulo.pdf
    • http://files.pickphysics.com/uploads/1/3/0/8/130873983/lakej_gawid_kezobotolaxi_vufimekam.pdf
    • http://files.drajaiseth.com/uploads/1/3/1/8/131871692/9f1d358ca5aa39b.pdf
    • http://files.billiescraftbeerfest.com/uploads/1/3/0/8/130814124/pugazedarileje.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovovowegafakaroseras.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4107173541.pdf
    • https://cdn.shopify.com/s/files/1/0429/4151/3895/files/pujudozebovozevabodabas.pdf
    • https://cdn.shopify.com/s/files/1/0434/3028/1381/files/hepatic_encephalopathy.pdf
    • https://cdn.shopify.com/s/files/1/0434/5357/9430/files/26105216323.pdf
    • https://cdn.shopify.com/s/files/1/0434/7478/0312/files/panapalozuxize.pdf
    • https://cdn.shopify.com/s/files/1/0432/0726/2367/files/47105344221.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/97766043152.pdf
    • https://cdn.shopify.com/s/files/1/0428/6811/3574/files/5e_ua_ranger.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1122/files/1610392415.pdf
    • https://cdn.shopify.com/s/files/1/0432/9934/0448/files/vovafu.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006220.bin
262796e8a7f560ccad71c7b017ea31a653cb4c997eb339071fe9c810308e887f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6220 5368 bytes
font_01_sfnt_off00007454.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7454 3720 bytes
font_02_sfnt_off00007fb7.bin
1c7c740926155c4ba023d6d178d0071da9ca19fa697d6029d15254ae7e803f41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB7 10220 bytes
font_03_sfnt_off0000a2b0.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2B0 4324 bytes
font_04_sfnt_off0000b0b0.bin
b8a83a1b7ee5b05129c0af7857fefaf3b097ecfbd5f629a5e01ad8f5a1925bf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0B0 7536 bytes

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