Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad4d9150400d7d2…

MALICIOUS

PDF

49.6 KB Created: 2020-08-24 07:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 290bc73828d6dea9e75799f682499f0f SHA-1: 419388318d6ccc52346f87abd2ac3f18a00a8b4b SHA-256: 5ad4d9150400d7d2e3ee566178a687a92f4e2b048aae01e38694fd6303521426
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure and a large number of external PDF links, suggesting a link farm or phishing attempt. The ML classifier also strongly flagged this PDF as malicious. The embedded URL 'https://ttraff.cc/pify?keyword=b+j+p+kamal+image' is a primary indicator of malicious intent, likely serving as a gateway to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=b+j+p+kamal+image
    • http://files.stjohnsstafford.org/uploads/1/3/1/3/131379194/33e47d548a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0443/3536/6300/files/omero_iliade_baricco_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1350/5185/files/vetizajijigov.pdf
    • https://cdn.shopify.com/s/files/1/0437/2457/0792/files/lepimigifizenenogajirafuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5080/3095/files/honeywell_5821.pdf
    • https://cdn.shopify.com/s/files/1/0431/6990/6852/files/rinipetapuvawadagaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/xavorudiririfofab.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/irc_set_topic.pdf
    • https://cdn.shopify.com/s/files/1/0434/5357/9430/files/1080p_wallpapers_for_android_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7913/files/5779151039.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053cb.bin
9dcea65edd5e0c62d32ca23411d7548a4c28c060d6c508ab7646b6265f366199
pdf-font-stream PDF embedded font (sfnt) at offset 0x53CB 4440 bytes
font_01_sfnt_off00006376.bin
93a9a4b5c6291edc24ede659c7de71d4ef2ed288ff0206b48394bfedf8cbb9d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6376 5052 bytes
font_02_sfnt_off000074a0.bin
a63b28d83be3efd951d3254e8f8571d9c13500c8b37bd01b3c16375d49b160bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x74A0 13968 bytes
font_03_sfnt_off0000a093.bin
e3766aa54f327a03e67c4583953c20b1772291d58123ac73959dff8a957bbc00
pdf-font-stream PDF embedded font (sfnt) at offset 0xA093 16832 bytes