Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a1c1a8f05915c10…

MALICIOUS

PDF

55.9 KB Created: 2020-08-09 04:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ee25e86754cf6c5a821c69fa0781919 SHA-1: fc5c50de4d24f99d4f135a159f744a7f15d9a5c4 SHA-256: 3a1c1a8f05915c107e5163a22a1afca4040fd36dfc73928b32a81448566c0397
120 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external links, including a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'https://ttraff.cc/pify?keyword=opposite+of+always+book+pdf'. This indicates a social engineering attempt to lure users to malicious infrastructure. The document body, though heavily obfuscated, contains the same redirector URL and a benign Shopify URL, reinforcing the redirection attempt.

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=opposite+of+always+book+pdf
    • http://files.nlspartners.com/uploads/1/3/1/4/131407647/68b80a55ffb3758.pdf
    • http://dejajaxa.heartofwoodbuffalo.ca/uploads/1/3/0/7/130775971/fimenu.pdf
    • http://files.blsherrington.com/uploads/1/3/2/7/132710783/5a57371a89.pdf
    • http://files.bronzebeautylounge.com/uploads/1/3/1/4/131482941/8103760.pdf
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/51367392534.pdf
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/78690183885.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/test_1879eb6a-339e-4d45-a409-571cd94a4742.pdf?v=1594212285
    • https://cdn.shopify.com/s/files/1/0434/5544/7202/files/94202723652.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nuvororixepexovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5831/4912/files/88428773890.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voxetevew.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/35350481577.pdf
    • https://cdn.shopify.com/s/files/1/0429/2886/5446/files/86941063576.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/basic_chinese_characters.pdf
    • https://cdn.shopify.com/s/files/1/0429/1841/2451/files/adorn_miguel_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/81640760244.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000841e.bin
05ae71f2af61ea8f380ac6e6d5fee2a76be95a7a032078634c876a59e85fbfca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x841E 5044 bytes
font_01_sfnt_off0000955a.bin
b90db19c2f777b7dc0b707ba2317d3983e4e68eda5e0f6ca056e06946e48e157		 pdf-font-stream PDF embedded font (sfnt) at offset 0x955A 2484 bytes
font_02_sfnt_off00009ff8.bin
effbe47ea911eec08908968ab03129c79c62575db3f171535d1a683c37af6cb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FF8 10536 bytes
font_03_sfnt_off0000c3f1.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F1 4324 bytes

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