Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4fa6a0ca21065b6…

MALICIOUS

PDF

33.4 KB Created: 2020-08-01 14:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e8323176984a1130bc92d6b8cb22f57 SHA-1: 8cba0ec6f6181dd6ed8357007fea0167817ba3c9 SHA-256: c4fa6a0ca21065b6243bcbf9b21fe5ecb3165c58f889da56056a2590a3c4d1e6
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.cc/pify?keyword=managerial+accounting+maher+11th+edition+pdf'. This URL is likely part of a phishing campaign designed to trick users into downloading malicious content by impersonating legitimate document downloads. The document body also contains obfuscated text and references to the redirector URL, further supporting this attack pattern. The presence of numerous other PDF links, many hosted on suspicious domains, indicates a link farm used for SEO poisoning or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=managerial+accounting+maher+11th+edition+pdf
    • http://files.reidcarrescia.com/uploads/1/3/1/0/131070178/fipakaga.pdf
    • http://files.chasethecrave.com/uploads/1/3/2/7/132741385/dinifametomifo-gupazezebip.pdf
    • http://files.mariapapapostolou.com/uploads/1/3/1/1/131164100/dufuwudibaz.pdf
    • http://files.artbyhaven.com/uploads/1/3/0/7/130775808/rixoweza-wimosodupafuf.pdf
    • http://files.azioshsfi.org/uploads/1/3/0/7/130776308/dipupi_pedumaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2128194791.pdf
    • https://cdn.shopify.com/s/files/1/0433/9400/7201/files/23998770469.pdf
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/discord_roleplay_servers.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/8240539209.pdf
    • https://cdn.shopify.com/s/files/1/0428/3065/9750/files/62028420806.pdf
    • https://cdn.shopify.com/s/files/1/0429/4970/5881/files/toripejemivaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9138/5758/files/80073206077.pdf
    • https://cdn.shopify.com/s/files/1/0434/0957/1990/files/pupivitotunolape.pdf
    • https://cdn.shopify.com/s/files/1/0438/4686/0957/files/vafazupadesaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/29008924171.pdf
    • https://cdn.shopify.com/s/files/1/0440/1112/6942/files/26600286872.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_off00004445.bin
d91f78584b90e3be97e712c87c53bb82a4f52703b7e755f6c284af73083aa65a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4445 5448 bytes
font_01_sfnt_off000056b4.bin
c51e7ce6bd9769f89660f38fdcf29f4957b22bb715397081671bc78abf9472f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x56B4 9452 bytes