Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcffca956ea0aa00…

MALICIOUS

PDF

96.1 KB Created: 2020-08-22 15:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b0f67e0adc3407ba3d45fcf8b652a1e SHA-1: a9bc2d01784b16234c0b81c56c3aa545176cca56 SHA-256: bcffca956ea0aa006dfcf12503baaa6d8b802b19f780283ab89766c91a485c61
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a link farm, which are designed to redirect users to external websites. One of the primary links points to a known malicious redirector, ttraff.ru, which is likely used to distribute further malware or phishing content. The document body itself is heavily obfuscated and contains the same suspicious URL, indicating a deliberate attempt to lure users to malicious infrastructure.

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=anti+lgbt+emoji+copy+and+paste+android
    • http://files.oldsskatingclub.ca/uploads/1/3/1/8/131871605/nuvusipojesa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4397/0463/files/78182101569.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/88453120244.pdf
    • https://cdn.shopify.com/s/files/1/0432/0667/2546/files/difetawivotikaxifu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/34531196998.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/zudoramupugofimip.pdf
    • https://cdn.shopify.com/s/files/1/0449/9764/0360/files/gazeta_koha_jone.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1256/files/visufazoraputisi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3135/5807/files/44024216215.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/1988830580.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71860998709.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 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c86.bin
3272052591ee660d230280eafffdcd6e204155eab3fb23425600e62d378e7c50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C86 7140 bytes
font_01_sfnt_off00009eb8.bin
98e3ee2020dc6576a21d7b6a27424e0575c64b8f9b312e44c96b97b6d65a4da8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EB8 7808 bytes
font_02_sfnt_off0000b081.bin
fcc05635329466b0ead5e8fda059233427f7a1e633eeb6666ca19c968150acc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB081 5700 bytes
font_03_sfnt_off0000c3c0.bin
a0107f3e0315a7eec5a4451b29cbadd56a86181715cdba04b3944ec2fa6db868		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C0 29536 bytes
font_04_sfnt_off000116df.bin
cf69403030af545b4b168c6a20fa28c71e22a2aafe387a2682111916ded983e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116DF 12856 bytes
font_05_sfnt_off0001421b.bin
014413189241ae9d606311a553161731fe9527f6f6ee7f9eeb7c391026f8f25e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1421B 19432 bytes
font_06_sfnt_off00016035.bin
d1b9677ab41be910b73e1beb95cbb7453beeb85b22243b8418a63be1618b3608		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16035 6192 bytes

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