Malicious PDF — malware analysis report

Static analysis result for SHA-256 e63bf6243e28f62b…

MALICIOUS

PDF

46.6 KB Created: 2020-08-11 07:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 383c40fc9d988f2d1a4bf3c55a22ce79 SHA-1: 69ff19ad65560e25bc1825bf28903008c896e0b8 SHA-256: e63bf6243e28f62b8a3ac09219c499b77d9c1cc154ae93bde3e9bd5d8cf0fefe
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be directing the user to the malicious URL via the embedded link.

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=emmeline+pankhurst+freedom+or+death+pdf
    • http://files.fadwa.com/uploads/1/3/0/7/130775635/pobibewekovi_negagavune_zuwopixufi.pdf
    • http://files.intrepidresearch.org/uploads/1/3/2/6/132682070/255424.pdf
    • http://nomozo.shaksygroup.com/uploads/1/3/1/6/131607062/laguseginen_rawefavu.pdf
    • http://files.dyercareers.com/uploads/1/3/1/4/131438260/gagopesiwitulamazu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/rilupujomanexovuzo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8177/6795/files/bread_bakery_business_plan_in_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4277/4938/files/78208562001.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/attached_amir_levine.pdf
    • https://cdn.shopify.com/s/files/1/0437/1555/9573/files/what_is_a_metaphor_for_love.pdf
    • https://cdn.shopify.com/s/files/1/0430/3683/5993/files/principles_of_catholic_social_teaching.pdf
    • https://cdn.shopify.com/s/files/1/0433/3184/6296/files/wuzokesuboromigegu.pdf
    • https://cdn.shopify.com/s/files/1/0439/6577/6030/files/96040000236.pdf
    • https://cdn.shopify.com/s/files/1/0432/4586/3067/files/jenuxetegipufofanu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2857/8467/files/forensic_files_episode_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/4737/0402/files/development_economics_debraj_ray_download.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_off00006aa9.bin
2fc4551ee84daa85f0e5884f68862228acb89f6e85fb7635eaa35399192e88e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA9 5184 bytes
font_01_sfnt_off00007c0e.bin
960c372099bbcdcf218f5308d7fbff2ddd33db786b7903dd0c9de22ab4fbcf8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0E 10344 bytes
font_02_sfnt_off00009f5a.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F5A 4324 bytes

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