Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e78d8e8ca4f7c24…

MALICIOUS

PDF

48.4 KB Created: 2020-08-23 21:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64b1f12c5059f430a7ed67f1e90bd28b SHA-1: 04e80ed2bf5f5e5de15a2d9189116d62bf17c996 SHA-256: 6e78d8e8ca4f7c2444ea33ae06efcd94dbc61b7c3fe3561cadc105cc5227ac50
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=aruba+pec++gratis, which is likely intended to lead the user to a malicious site. The presence of many Shopify links suggests an attempt to blend in with legitimate content while hiding the malicious redirector.

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=aruba+pec++gratis
    • http://files.garrettcameronmusic.com/uploads/1/3/1/4/131452939/4244457.pdf
    • http://files.historichopewellchurch.org/uploads/1/3/1/8/131858791/7265170.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/1581/2766/files/world_school_debate_format.pdf
    • https://cdn.shopify.com/s/files/1/0434/7602/5501/files/manual_j_load_calculation.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tanedikefiresemur.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4366/files/85629527391.pdf
    • https://cdn.shopify.com/s/files/1/0462/5183/5543/files/neet_2020_form_fill_up_fees.pdf
    • https://cdn.shopify.com/s/files/1/0434/2962/6013/files/78796363147.pdf
    • https://cdn.shopify.com/s/files/1/0427/7485/5846/files/60363571365.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/kasewuxubeger.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4434/files/batobebezolizimudet.pdf
    • https://cdn.shopify.com/s/files/1/0434/5911/7222/files/javascript_canvas_library.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/42375791034.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006615.bin
518ab10cc67d11b7e01300e08a64705c01a24aaca5000411277fbe0ad485e28b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6615 4864 bytes
font_01_sfnt_off000076b0.bin
f34fb4a89f3717645909314b4341f798af76e30f1c9951f35c07ccceebcf7154		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B0 14884 bytes
font_02_sfnt_off0000a57c.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA57C 4324 bytes

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