Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4bc88a3e4decc5c…

MALICIOUS

PDF

50.7 KB Created: 2020-07-30 20:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 678c9d70006e202bb53110d7a0628ea6 SHA-1: 285998fd338ebfaa8be03d86a58a0ecda3e34581 SHA-256: f4bc88a3e4decc5c58cff5064399c294894ba1126647bd4cde109d99da08156e
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, with a critical heuristic firing indicating a link to a known malicious redirector at 'ttraff.com'. Another critical heuristic identified a mass external PDF link farm, with the first URL pointing to 'cdn.shopify.com'. The document body, though heavily obfuscated, suggests a lure related to a 'Bootstrap 4 tutorial pdf'. The combination of these factors strongly indicates a phishing or malware distribution 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.com/pify?keyword=bootstrap+4+tutorial+pdf
    • http://files.applied-magnetics-shop.com/uploads/1/3/1/0/131070151/d4acf45.pdf
    • http://files.wompostcoop.com/uploads/1/3/0/7/130776222/ripamuru.pdf
    • http://files.tpd-art.com/uploads/1/3/0/9/130969942/vomizov-xajinoxabij-lolakajexaku-waseda.pdf
    • http://files.fraclan.com/uploads/1/3/0/8/130874180/jepixodixijasagu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/32521431925.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/96622753208.pdf
    • https://cdn.shopify.com/s/files/1/0430/4309/4677/files/jirivofavatosukulelizifik.pdf
    • https://cdn.shopify.com/s/files/1/0432/5271/1581/files/jiraxekos.pdf
    • https://cdn.shopify.com/s/files/1/0436/8737/9094/files/dizuzalefefebavuraz.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/pamevuxogoginipejisuxere.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2903/files/64479291184.pdf
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/joralerepiwizoxebotalinuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/3065/9750/files/zemidoxivoxega.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/20094021772.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2581/files/19355455925.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/63436986644.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9423/files/55876691416.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91960476686.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6721/files/zesekibibowivupopidopi.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_off00007e02.bin
a88a075e8470afa03aecc90063b454a6e441d9e796e16ef36282d238409d5c66
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E02 4828 bytes
font_01_sfnt_off00008e7f.bin
f75ed820fc7f00f18365f9d9070fd93fd08cd97d41489749b695a1ece6d03811
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E7F 14780 bytes