Malicious PDF — malware analysis report

Static analysis result for SHA-256 a261826f90ab8696…

MALICIOUS

PDF

47.3 KB Created: 2020-08-21 14:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e7ad3ec34eb5d4e2a62025daca1474c SHA-1: f3f7fe033115e850913a9f6d65033184c2e88443 SHA-256: a261826f90ab86967ce80e60f973559b7d018e3a074a77fa4171b4c7addcaae8
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=bhairava+dweepam+songs++balakrishna'. It also exhibits characteristics of a PDF SEO link farm, with numerous links to external PDF files hosted on domains like cdn.shopify.com. The document body, though heavily obfuscated, contains the same redirector URL. The primary intent appears to be directing users to malicious infrastructure, likely for phishing or malware delivery.

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=bhairava+dweepam+songs++balakrishna
    • http://files.peytonpickenpaugh.com/uploads/1/3/1/4/131406291/e383c.pdf
    • http://tipilapip.guitarsandbourbon.com/uploads/1/3/1/3/131398027/zedus.pdf
    • http://files.kathrynprice.co.nz/uploads/1/3/0/8/130813639/3764113.pdf
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/allan_kardec_libri.pdf
    • https://cdn.shopify.com/s/files/1/0435/1826/3464/files/vogeso.pdf
    • https://cdn.shopify.com/s/files/1/0430/4958/2743/files/wesubeto.pdf
    • https://cdn.shopify.com/s/files/1/0429/2496/6044/files/50896657953.pdf
    • https://cdn.shopify.com/s/files/1/0434/1940/2405/files/befinurapetigajizu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7728/files/72524474343.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/surorut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sivezijikok.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/38624692083.pdf
    • https://cdn.shopify.com/s/files/1/0431/6469/6732/files/assamese_whatsapp_video_comedy.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0487/files/wogofeteluma.pdf
    • https://cdn.shopify.com/s/files/1/0434/1547/0245/files/51395543093.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_off00007710.bin
9473adeba868feeecc1e607cf066ad3f85e13ea89f18b0fc6ba2f4d4f6a8a225		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7710 5776 bytes
font_01_sfnt_off00008aad.bin
336acc3a31d83a0ace2e5ef9b12026be1b9d25a1c21bf6861bbb6e73b429f1c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAD 10424 bytes

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