Malicious PDF — malware analysis report

Static analysis result for SHA-256 937c995ff02edf37…

MALICIOUS

PDF

46.8 KB Created: 2020-08-20 03:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 977f598dab6993ea72b284b7a953a16b SHA-1: 3b5eabbe9729c281041e7cc25ad3ace1cf1b4c3c SHA-256: 937c995ff02edf3739c6e2be3e448cdd173abc9548c8ac1e4ca8263bd19848a8
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=apple+vs+android+market+share+us'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct users to potentially harmful content under the guise of information about market share.

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.ru/pify?keyword=apple+vs+android+market+share+us
    • http://files.udaratherapy.com/uploads/1/3/0/7/130775135/4eb8b4945e9a.pdf
    • http://files.serclc.org/uploads/1/3/1/4/131482926/74b15.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/luzofaligit.pdf
    • https://cdn.shopify.com/s/files/1/0431/7400/2837/files/sozimisulixoje.pdf
    • https://cdn.shopify.com/s/files/1/0431/8747/0499/files/5g_antenna_technology.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/949986333.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/onicon_system_10_btu_meter_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/3896/4903/files/sig_p320_armorers_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/3097/9495/files/gapobivofemujewezu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7147/1767/files/convert_html_to_in_asp._net_c_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/ritafabodenedoro.pdf
    • https://cdn.shopify.com/s/files/1/0432/7987/6252/files/manejo_amenaza_de_aborto.pdf
    • https://cdn.shopify.com/s/files/1/0427/3537/0407/files/59300437328.pdf
    • https://cdn.shopify.com/s/files/1/0435/5201/4491/files/astrology_books_in_english.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_off00006d83.bin
6610cf31733ef449b9b23bb785f1caf3a179710dd0b8b0b26936c5e4637e541c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D83 5312 bytes
font_01_sfnt_off00007f6a.bin
c1558632f0eb5e2d6d40c10d667325e84c612b4a83f6a20dd206eb408c645958		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6A 15024 bytes

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