Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fa47c8bd7b02bbf…

MALICIOUS

PDF

39.8 KB Created: 2020-07-09 00:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a76b796c00fa13bdec3e8b3f2994bf12 SHA-1: 8576fccdc1d8e2ca3085d4251f62bf925aa9305d SHA-256: 5fa47c8bd7b02bbf014e378d446997635d7cba19b4684e559c60881f5f5a69f8
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector at 'https://ttraff.com/wb?keyword=save%20rotated%20pdf%20foxit%20reader'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated PDF links, suggesting an attempt to drive traffic to potentially malicious content or phishing sites. The ML classifier also strongly flagged this PDF as malicious.

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.com/wb?keyword=save%20rotated%20pdf%20foxit%20reader
    • http://files.foxlakeresort.com/uploads/1/3/2/7/132740482/98be447.pdf
    • http://files.netlander.com/uploads/1/3/0/8/130814785/64ebcfee.pdf
    • http://files.feilonglight.com/uploads/1/3/2/6/132696117/goronijiwi.pdf
    • http://files.mckenziebible.org/uploads/1/3/1/4/131452953/d651091ba2efc26.pdf
    • http://files.floridaufonetwork.com/uploads/1/3/0/7/130775368/lezutawejo_lusipaxajegefi_kizija.pdf
    • http://files.vermontsingingdrum.com/uploads/1/3/0/7/130775726/943e9227eb.pdf
    • http://files.livinggodsmission.com/uploads/1/3/0/8/130874413/femobupowufebekoluta.pdf
    • http://files.merakicowithlove.com/uploads/1/3/0/7/130740124/fa2220705c.pdf
    • http://files.whitepeacockcoffee.com/uploads/1/3/1/4/131436971/7dad80.pdf
    • http://files.potterysocial.com/uploads/1/3/0/7/130739315/mopufa_padodafu_limebozakapire.pdf
    • http://files.martialhartamas.com/uploads/1/3/0/8/130814279/6186ec0be38b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://xiwidex.files.wordpress.com/2020/07/gufider.pdf
    • https://fitapozuwox.files.wordpress.com/2020/07/razukosusubebibonazamuza.pdf
    • https://pefugobojum.files.wordpress.com/2020/07/lavekopipajemix.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65587220918.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20745245188.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85755015361.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52665001447.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fdd.bin
9650305408012aeec65b3e6a4081e7734c1dd8b06d59b37f6f05b69de70ae824		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDD 4740 bytes
font_01_sfnt_off00007011.bin
16b9370df641bc98a1509eb2d3e5aca35396de889e055300f3a874f1ba089e8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7011 10000 bytes

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