Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeae64afec79564d…

MALICIOUS

PDF

46.5 KB Created: 2020-08-04 14:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ceb68f8584e203f2e4f9db1d2fb42a84 SHA-1: e10116d47fcfd3c72b315ac7a4ed58e8a6cffa14 SHA-256: eeae64afec79564d8a1f841608586c33685aa5e693f9f1cd78197439e986892b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm designed to lure users to potentially harmful sites. The document body itself is largely obfuscated but contains a reference to the redirector URL.

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=can+you+keep+a+secret+livro+pdf
    • http://files.misfitpictureshows.com/uploads/1/3/1/0/131070500/nomevo.pdf
    • http://files.barriointellect.com/uploads/1/3/2/7/132740321/104c7d.pdf
    • http://rasuped.goodwallscholarships.com/uploads/1/3/1/4/131483200/4712142.pdf
    • http://ferufab.woottonarts.com/uploads/1/3/2/7/132740978/wuxanobono.pdf
    • http://xizebutev.designerconsignors.com/uploads/1/3/0/7/130738524/mawobubuz_levije_kiwosikisubofok_galefiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/fusopavutiwomet.pdf
    • https://cdn.shopify.com/s/files/1/0434/0904/7717/files/wejibalenofanageruredo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0089/7440/files/34265949775.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/35633410362.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/selifomekokomasodijode.pdf
    • https://cdn.shopify.com/s/files/1/0431/2737/3986/files/xanupiwaxukepemumagus.pdf
    • https://cdn.shopify.com/s/files/1/0428/8924/8924/files/somopewoluvazovotekolajel.pdf
    • https://cdn.shopify.com/s/files/1/0432/1394/7041/files/cub_cadet_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/2897/0652/files/colorear_unicornio.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/53653289727.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/52597595021.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/batetoful.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/wokosagedobujer.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_off000069df.bin
b7bb17e16491a55b3cf24bb021129b42ee71ebd5ad002526e8256ffa8e4aa67c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69DF 5280 bytes
font_01_sfnt_off00007bf8.bin
9c85d60549751a0655d0ebca3e4de769077a12df74656ab73716495538582e3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF8 10192 bytes
font_02_sfnt_off00009ecf.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ECF 4324 bytes

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