Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b9d5d4dfadfc45…

MALICIOUS

PDF

78.2 KB Created: 2020-09-13 18:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8b31d8d5e0bc928e6198799b6687830 SHA-1: acccc5d5fa07d9d20a7c656e52a1f18ec6e356aa SHA-256: 69b9d5d4dfadfc4516c40833e7770bbf0e7554bab3dc2d4907c6f3c03e5453ae
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to trick users into believing they are involved in a lottery or prize, requiring further action like parcel delivery, which is a common advance-fee fraud tactic. The presence of embedded URLs and the link farm structure suggest an attempt to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.ru/wix?keyword=gundam+weapons+wiki
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/6da380_5331e6af5ae849f6a8d84b60e225e252.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_63dd8064ba2b43fb8d30721b568f9890.pdf
    • https://static.usrfiles.com/ugd/8ebb60_5437a78568214733915905c7fc453222.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0033/files/luzazevogibu.pdf
    • https://static.usrfiles.com/ugd/6d59ab_4e8e92b9b828465ab107c3fef3151879.pdf
    • https://static.usrfiles.com/ugd/54fa57_c2973c33798c4c5eb416c180501055e7.pdf
    • https://static.usrfiles.com/ugd/d6b5da_ef274c1071654472b3b3b760590577f8.pdf
    • https://cdn.shopify.com/s/files/1/0428/0877/0726/files/wijofe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3611/4076/files/exporting_outlook_contacts_to_excel_spreadsheet.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8f2.bin
3859676ade10e996571197032923ebb95e2681cd6aba3a10aec76a24d7af18a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8F2 3088 bytes
font_01_sfnt_off0000c3e0.bin
f1dacf9e277a145cae99ea4fabe85eb26f7c6326bc39e145165553f4d2e44725		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E0 4964 bytes
font_02_sfnt_off0000d4b6.bin
cb53a503f8ca8f46d1f3d5bcdb70d5ca92fd1b4a1c3bfdf85759ece3d89dac6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B6 16492 bytes
font_03_sfnt_off0001073a.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1073A 16092 bytes
font_04_sfnt_off00011c02.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C02 4324 bytes

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