Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9600ee6d8fcb608…

MALICIOUS

PDF

47.1 KB Created: 2020-08-09 22:32:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e47032abc26c674eeb7cbea5555596e8 SHA-1: 6c4414be4bb518423e552b2682aab3017a82943a SHA-256: b9600ee6d8fcb6082c9143b39fd6ff4ed50cadbcf0c7dddb1ff536114e38ccfe
154 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, specifically 'https://ttraff.cc/pify?keyword=libros+para+aprender+ingles+leyendo+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many pointing to Shopify domains, suggests a link farm or SEO poisoning technique to mask the malicious intent. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or malware delivery attempt.

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=libros+para+aprender+ingles+leyendo+pdf
    • http://pawurefiz.setgogym.co.uk/uploads/1/3/1/1/131164250/23ac6deb5b4ed.pdf
    • http://files.msunavs.org/uploads/1/3/1/8/131856433/jirifadaf_xogavafugof_kanawafef.pdf
    • http://tuxagur.dldtassociates.com/uploads/1/3/1/3/131380213/pizuj.pdf
    • http://files.hkminimefencing.com/uploads/1/3/2/6/132681150/5640214.pdf
    • https://cdn.shopify.com/s/files/1/0431/5407/9904/files/50247780729.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/26875468616.pdf
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/vimeronelurelafibapif.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2712/files/141707869.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4840/files/risijomodowirik.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/stardew_valley_mods.pdf
    • https://cdn.shopify.com/s/files/1/0438/3762/0381/files/28619169282.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/discussion_essay_example.pdf
    • https://cdn.shopify.com/s/files/1/0435/7337/9230/files/31176358441.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3257/files/13011749163.pdf
    • https://cdn.shopify.com/s/files/1/0435/6407/3128/files/17841691037.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/157454649.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/jesunanugokub.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/7574711824.pdf
    • https://cdn.shopify.com/s/files/1/0433/4478/9669/files/46437219571.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_off00006a62.bin
30954f3b79b427322544a582e20f69f1e0140cfac0d2b288dd851e04e5ea8106		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A62 5100 bytes
font_01_sfnt_off00007bb8.bin
3a4b2e4b25b80d4d0a2aa8b971eeff230d4e7f6139b4193c5c9fbb6b8cf127ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB8 11008 bytes
font_02_sfnt_off00009f61.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F61 4324 bytes

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