Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c67ab0192e8f91d…

MALICIOUS

PDF

49.5 KB Created: 2020-07-31 15:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8d562352872f98e3ec60fda60fc6788 SHA-1: ed2e53f9b51ec6db65999fc24b84a9db0ad06228 SHA-256: 4c67ab0192e8f91dc1826d764b5b543521c89268da1c0b06746789b12c15c859
128 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.ru/pify?keyword=chat+heads+android', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains keywords related to Android chat heads, suggesting a potential lure. The presence of a malicious redirector and a link farm indicates an attempt to drive traffic to malicious sites, likely for SEO poisoning or malware distribution.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=chat+heads+android
    • http://files.quantumpoint.org/uploads/1/3/0/8/130874031/fexurugomaseba_livorejalolokib_kuluvewowa.pdf
    • http://files.artisticsynergy.org/uploads/1/3/1/0/131069824/jumutigaxel_petugi_zizolaluwiv.pdf
    • http://files.rebalancewithbianca.com/uploads/1/3/0/7/130775744/boxadizerisi.pdf
    • http://files.marcelstewartart.com/uploads/1/3/2/6/132681281/df0d4a190d9972.pdf
    • http://files.penincorp.com/uploads/1/3/0/9/130969960/295392b1.pdf
    • http://files.penincorp.com/uploads/1/3/0/9/130969960/2
    • https://cdn.shopify.com/s/files/1/0431/7744/3483/files/zalimojalut.pdf
    • https://cdn.shopify.com/s/files/1/0430/3018/4087/files/katotomo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8255/5297/files/17256705699.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/jogonezubatones.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/76076328804.pdf
    • https://cdn.shopify.com/s/files/1/0436/0064/2211/files/41611536534.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rofan.pdf
    • https://cdn.shopify.com/s/files/1/0429/4665/8463/files/61161298885.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/resozelofik.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/46033732336.pdf
    • https://cdn.shopify.com/s/files/1/0436/6408/1046/files/wazuponik.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/79608147772.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9535/files/53784070175.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_off000085df.bin
04b6f9d359b2c92435edd8f5bdf9667ae713ca26d89cd699b1f1608ea0dcafcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85DF 4692 bytes
font_01_sfnt_off000095be.bin
25847912c195884e8679bd53669e12a0248e757aed20a952d8a5390755633124		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95BE 10260 bytes

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