Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a82efaea96bab67…

MALICIOUS

PDF

47.1 KB Created: 2020-07-30 21:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a5ddced96ba7117b5b970cd4e39980c SHA-1: e78cbd0c68d4beb577ffcd507275d33f05333450 SHA-256: 6a82efaea96bab67bca93700c4aa594a1fdf7c208a236063e20778709e821185
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The primary redirector URL, 'ttraff.cc', is flagged as malicious. While no scripts were extracted, the presence of numerous links suggests an attempt to lure users to malicious sites, potentially for further exploitation or phishing. 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.cc/pify?keyword=ordering+numbers+worksheets+4th+grade+pdf
    • http://files.molly-boone-wed.com/uploads/1/3/1/3/131379223/wusitisatituji-tinebixipizibi-jipovefunuxu-veguf.pdf
    • http://files.richardellishair.co.uk/uploads/1/3/1/4/131407357/buxonojudewas-lurazedi.pdf
    • http://files.chiminisiberians.com/uploads/1/3/2/7/132710780/7fdc5bf48522.pdf
    • http://files.makingwithwords.com/uploads/1/3/1/1/131164321/3c54f9c4c3e16f5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/degupes.pdf
    • https://cdn.shopify.com/s/files/1/0431/1557/7504/files/67066259586.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94448736580.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/zemorezageniriwa.pdf
    • https://cdn.shopify.com/s/files/1/0438/3745/6534/files/burewarunexesuzuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4143/1464/files/34148238600.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9037/files/22179373692.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/15036216634.pdf
    • https://cdn.shopify.com/s/files/1/0438/7520/5288/files/23247458297.pdf
    • https://cdn.shopify.com/s/files/1/0430/6409/8970/files/69197476934.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/kiwaduvitofaviladovikot.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/17507874725.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_off00007894.bin
99da466614b4d99db8ed0a42823ba9345106451c07d6e0d0f46d51401a06cb1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7894 5716 bytes
font_01_sfnt_off00008bf8.bin
08a1ec10e3c49b3818cc2947555bddad908743b5ee7a490cb04f059e55645fda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF8 10100 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.