Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac81544f41a6854…

MALICIOUS

PDF

45.4 KB Created: 2020-08-20 14:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eae849e20946f0ad35fc7b84d35d115d SHA-1: c67ccbb06c05791716e3f0fc40378d29eddfb236 SHA-256: 6ac81544f41a6854ea38823278afd5a0bca5582bce1b00785d30236bc46928b7
174 Risk Score

Malware Insights

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

The PDF contains a lure to enable macros or editing, a common tactic for malware droppers. It also embeds numerous links, with one critical heuristic identifying a link to known malicious redirector infrastructure at https://ttraff.com/pify?keyword=2+inch+binder+spine+template+microsoft+word. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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/pify?keyword=2+inch+binder+spine+template+microsoft+word
    • http://files.everbrookefarms.com/uploads/1/3/2/8/132815968/rozuva-refagomudi-webiligijifijej-lotilawalobu.pdf
    • http://newapig.syntheticephemera.com/uploads/1/3/0/8/130814017/2947833.pdf
    • http://bokifema.caribbeanshadeproducts.com/uploads/1/3/1/4/131453177/gadetubirafevofejowe.pdf
    • http://files.balmdotcalm.net/uploads/1/3/1/0/131069968/5683247.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0451/4267/1513/files/11294769638.pdf
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/sky_f1_calendar_2019.pdf
    • https://cdn.shopify.com/s/files/1/0434/1697/7559/files/agile_software_development_model.pdf
    • https://cdn.shopify.com/s/files/1/0434/1032/5671/files/lusunuderatunidixat.pdf
    • https://cdn.shopify.com/s/files/1/0431/6400/8605/files/bajaj_ceiling_fans_catalogue_with_price.pdf
    • https://cdn.shopify.com/s/files/1/0447/8612/2901/files/makalah_bilangan_kuantum.pdf
    • https://cdn.shopify.com/s/files/1/0430/0819/6767/files/83971830720.pdf
    • https://cdn.shopify.com/s/files/1/0432/4186/5384/files/subway_franchise_operations_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/8987/7397/files/42533795177.pdf
    • https://cdn.shopify.com/s/files/1/0434/6868/5464/files/34079228770.pdf
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/14766637453.pdf
    • https://cdn.shopify.com/s/files/1/0439/4621/3544/files/68070280406.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_off00007330.bin
b24d161c6b2cf6b48fd54fda12aac5fa37580b99e7ded1e529946641fccb64a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7330 5664 bytes
font_01_sfnt_off00008647.bin
66c7255e2dbb20aef31c654ad39f20d0a51091e9fc4537e7bf2f4cbd31c0939f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8647 10060 bytes

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