Malicious PDF — malware analysis report

Static analysis result for SHA-256 1edaef387c03b91c…

MALICIOUS

PDF

44.1 KB Created: 2020-09-12 08:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 019a9ff3bf185dbaaf4ee12dff4ac70b SHA-1: aea5187180e141b72369197059ef585924fa657e SHA-256: 1edaef387c03b91c4cf460aa406f79506ca692a58e5134a1fad4927cbad6ed85
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to a 'food guide'. The presence of a link farm and a critical ML classification further support its malicious nature. The primary malicious IOC is the redirector URL, which likely leads to further stages of the attack.

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.me/pify?keyword=hassle+free+daily+food+guide
    • http://fuletub.trinitywellnesscharleston.com/uploads/1/3/0/9/130969525/mobotumape.pdf
    • http://files.joshreynoldsyeo.com/uploads/1/3/0/7/130738722/4fdc8637be7.pdf
    • http://files.aancinc.org/uploads/1/3/0/8/130874400/a1b93e3a.pdf
    • http://files.jrscloset.com/uploads/1/3/1/4/131437669/memigaxiwixiw_jegefujo_gupes_movajit.pdf
    • http://files.thepygmygoatsocietyofireland.com/uploads/1/3/1/4/131408056/6625176.pdf
    • https://static.usrfiles.com/ugd/4ae4db_e1fa1bdeaadd48b2be90377b90cfed6a.pdf
    • https://static.usrfiles.com/ugd/85d67f_41a6fb6f4b9c45af837c06aca7c33dc3.pdf
    • https://static.usrfiles.com/ugd/289c5e_61413ae497c44579b6ff12014df93e55.pdf
    • https://cdn.shopify.com/s/files/1/0437/3705/5393/files/table_css_template_simple.pdf
    • https://cdn.shopify.com/s/files/1/0428/5965/9420/files/muwat.pdf
    • https://cdn.shopify.com/s/files/1/0439/0918/5688/files/liquid_waste_management_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/8090/7938/files/mofoxirabuw.pdf
    • https://static.usrfiles.com/ugd/b48b60_e268ed088953446285aa5c19fc330f5c.pdf
    • https://static.usrfiles.com/ugd/6fd45c_d8d191aff9ce40a09314c4b025aac356.pdf
    • https://static.usrfiles.com/ugd/b444d4_c4fe077b40d64c64acc92047711b7922.pdf
    • https://static.usrfiles.com/ugd/3e9e83_31ba9fa2bf3b4c73bb1c5b6106e70bab.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_off00006ee1.bin
c3860116c732c6b5db415478e590c753000bb8fb9fd67b2f758b4bdeaee4c931		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE1 5140 bytes
font_01_sfnt_off00008078.bin
272822cefa61efec1bf638ad3fe87ab62da247b09f0b319d00d48559aa6fa50c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8078 10120 bytes

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