Malicious PDF — malware analysis report

Static analysis result for SHA-256 f574adcfbe623de3…

MALICIOUS

PDF

46.3 KB Created: 2020-09-03 09:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0dba1c5d11b431d976168629c250303e SHA-1: 4e0e33f39e157ff6542b019c33c44c0d642049b0 SHA-256: f574adcfbe623de387358e4cc1889dc09fb09c722d9f9c3ceae5518463de20d9
152 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Prudential life insurance cash surrender form', suggesting a phishing or scam lure. The presence of a malicious redirector indicates an attempt to lead the user to a harmful destination.

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.me/wix?keyword=prudential+life+insurance+cash+surrender+form
    • https://cdn.shopify.com/s/files/1/0463/1327/5554/files/boot_manager_usb.pdf
    • https://cdn.shopify.com/s/files/1/0437/9725/0210/files/ffxiv_special_characters.pdf
    • https://cdn.shopify.com/s/files/1/0438/2726/5693/files/14395678087.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f430eee9e9b442993b1fc04c3d562ac.pdf
    • https://static.usrfiles.com/ugd/b916f4_ba40d3875f5e4c73aee2e0e1cccd4258.pdf
    • https://static.usrfiles.com/ugd/5438e3_2feebddf15b54d5bb1a58e057dd6f423.pdf
    • https://static.usrfiles.com/ugd/fef806_77800c08d2d24ab38d09545cc31044cc.pdf
    • https://cdn.shopify.com/s/files/1/0429/6320/6307/files/92365131473.pdf
    • https://cdn.shopify.com/s/files/1/0438/6809/4629/files/andrew_w._k._party_hard.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9646434013.pdf
    • https://cdn.shopify.com/s/files/1/0434/8765/8141/files/norman_stone_breve_historia_de_la_primera_guerra_mundial_pdf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060da.bin
f5c54120cba0b0c8fe24f910b73ad8c76e2c77868d9b9d4f2e4b905a2c73779f
pdf-font-stream PDF embedded font (sfnt) at offset 0x60DA 5144 bytes
font_01_sfnt_off0000721e.bin
f6b88acffb3a16bff2b9fc0dcbf2687bcd43c6ad3d1aed2d869c9d81089c4ce9
pdf-font-stream PDF embedded font (sfnt) at offset 0x721E 14072 bytes
font_02_sfnt_off00009e3d.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E3D 4324 bytes