Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0ab391b7aa2a42…

MALICIOUS

PDF

38.5 KB Created: 2020-08-13 02:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 947bb8ffcef3e6424cd380201d05413a SHA-1: 30d8c15ab3d5832231fd7b5215eb2df5e6fb0b31 SHA-256: 4e0ab391b7aa2a4251e65b42731b65accd8a4c8009a439a7a79f51bd1bc05fd6
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.com/wb?keyword=calculating%20circumference%20of%20a%20circle%20worksheet. The document body, though heavily corrupted, contains references to a worksheet and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a large number of external PDF links further supports the SEO link farm heuristic.

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/wb?keyword=calculating%20circumference%20of%20a%20circle%20worksheet
    • http://files.grillhousearmenia.es/uploads/1/3/1/3/131379439/489133.pdf
    • http://files.dismag.org/uploads/1/3/1/3/131378779/rufopunumizure.pdf
    • http://files.micpr.org/uploads/1/3/0/7/130739519/sogizivonozalexira.pdf
    • http://files.greggrussellstudio.com/uploads/1/3/1/4/131405958/ganikabesen-kugozujelisuki.pdf
    • https://cdn.shopify.com/s/files/1/0434/2359/6693/files/26864647447.pdf
    • https://cdn.shopify.com/s/files/1/0440/7099/4085/files/lojidunogizip.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/bosquejos_biblicos_evangelisticos.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/52148555264.pdf
    • https://cdn.shopify.com/s/files/1/0436/2836/3939/files/simple_present_tense_worksheets_for_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0432/8338/2427/files/penowugaberab.pdf
    • https://cdn.shopify.com/s/files/1/0447/9008/7829/files/bopp_tape_manufacturing_process.pdf
    • https://cdn.shopify.com/s/files/1/0432/5838/0446/files/91556800648.pdf
    • https://cdn.shopify.com/s/files/1/0434/1307/8174/files/gefijexofonu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/19607164172.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_off000057c5.bin
0669efeefe14adc0c54c8000caedac4544b2652bf9ea7a06932b52cc2b1cb29a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C5 5356 bytes
font_01_sfnt_off000069e0.bin
d8b5d739377d3017fd6c81cc34c7dfad35d6726c1406d9b454c6184c05dbd83e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E0 10124 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.