Malicious PDF — malware analysis report

Static analysis result for SHA-256 17bc22fb681b99e5…

MALICIOUS

PDF

40.7 KB Created: 2020-08-01 23:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e9daa9938746e3545a8015398e23ea6 SHA-1: b8deff1586e388e46533defee26f5150c141e533 SHA-256: 17bc22fb681b99e52c5193f559c8504ff852d0389c5887354ea96214b589ecdd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a known malicious redirector domain (ttraff.com). The document body and embedded links suggest a lure related to freight services, likely intended to trick users into clicking through to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=american+freight+fort+myers+fl
    • http://files.sclegendsvbc.com/uploads/1/3/0/8/130814529/lasijuroduzax.pdf
    • http://files.healthyhap-peanutrition.com/uploads/1/3/1/3/131383791/8095551.pdf
    • http://files.nadinenapear.com/uploads/1/3/1/4/131437508/xugeku.pdf
    • http://files.lanierbotanicals.com/uploads/1/3/0/7/130739143/fubobejibubaliger.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/21901003726.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9927/files/86534296651.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tizisixurodegu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3348/5727/files/90187057003.pdf
    • https://cdn.shopify.com/s/files/1/0434/5466/0758/files/34061252513.pdf
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/sotekekefemibi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/finuxupemapuze.pdf
    • https://cdn.shopify.com/s/files/1/0430/3706/5370/files/bipevusunovixaderotiwevax.pdf
    • https://cdn.shopify.com/s/files/1/0434/6383/5814/files/dagoliwufufipamanisewu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/27551335347.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/96156633845.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_off0000526e.bin
29f705f59da09838a8c59e9156064b98ca01db509163cc135e18ff83a05784f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x526E 5176 bytes
font_01_sfnt_off000063d3.bin
adc947751f478b45b4aa0a583e56f5de750abf82b739c8df80c4950c691c53ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D3 10600 bytes
font_02_sfnt_off000087fb.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87FB 4324 bytes

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