Malicious PDF — malware analysis report

Static analysis result for SHA-256 dffd966b33472bfe…

MALICIOUS

PDF

44.5 KB Created: 2020-08-09 17:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7081278174734b779d4131fd159f76ab SHA-1: d9cd5827d36cfe2357b58c13ed280aac292ba98b SHA-256: dffd966b33472bfe74d65ff12d9e8a62164fd1c027c0d3b3b32daf4099a27415
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to fractions and worksheet, suggesting a lure. The heuristic firings indicate the PDF is designed as a link farm and redirects to malicious infrastructure. The primary malicious URL is https://ttraff.com/pify?keyword=adding+and+subtracting+dissimilar+fractions+worksheet+pdf, which likely serves as a gateway to further malicious content.

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.com/pify?keyword=adding+and+subtracting+dissimilar+fractions+worksheet+pdf
    • http://gakazif.m7enterprise.com/uploads/1/3/2/6/132681670/kexevedapa.pdf
    • http://famed.gracefamilysudbury.com/uploads/1/3/1/4/131406082/rovoxutetix-vokusogexezunu-xozatebu.pdf
    • http://files.russellsproutsofsunnysideschool.com/uploads/1/3/0/8/130874317/saxope.pdf
    • https://cdn.shopify.com/s/files/1/0433/2702/9400/files/xekixebadelakukorupureju.pdf
    • https://cdn.shopify.com/s/files/1/0432/1771/5361/files/zojipek.pdf
    • https://cdn.shopify.com/s/files/1/0443/1475/5228/files/texas_postnuptial_agreement_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/0831/0943/files/21492471223.pdf
    • https://cdn.shopify.com/s/files/1/0438/7618/8315/files/98073019179.pdf
    • https://cdn.shopify.com/s/files/1/0449/3040/0411/files/sword_emoji_copy_and_paste.pdf
    • https://cdn.shopify.com/s/files/1/0428/7725/5836/files/tapamuvot.pdf
    • https://cdn.shopify.com/s/files/1/0433/7070/9150/files/89651968142.pdf
    • https://cdn.shopify.com/s/files/1/0436/9491/5738/files/walevad.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/wutafaside.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/super_minecraft_maker.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/biochemistry_book_lehninger_download.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_off00006f02.bin
b64b1f3bdae245043dc1c75943a74029037dd17648046c5ecccb8aa1fc76802e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F02 5856 bytes
font_01_sfnt_off000082d7.bin
005f5641abd5f81c5441db788c3938b31fe68a9529e3d490113544d0f21d063d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82D7 9896 bytes

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