Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d9c98d29f4260a3…

MALICIOUS

PDF

39.2 KB Created: 2020-08-06 13:24:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a81f6a709f0b011858f607c3d61efdf SHA-1: 7ba0d9bfdc7ae17a97496bd5480e922ca70d5da8 SHA-256: 9d9c98d29f4260a34797f3488b537ec2784153de38c0518355948bb3f5867a69
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to a known malicious redirector infrastructure at ttraff.cc. The document body, though heavily obfuscated, also contains this malicious URL, suggesting an attempt to lure users to malicious content. The ML classifier strongly supports the malicious verdict.

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=caballo+de+troya+10+el+dia+del+relampago+pdf
    • http://files.moretonbaycancercare.com.au/uploads/1/3/1/8/131871852/7307992.pdf
    • http://files.jasminewisephd.com/uploads/1/3/0/8/130814529/pulologabaregexodadu.pdf
    • http://files.makesomenoise.online/uploads/1/3/1/0/131070151/9f4c179932f3d04.pdf
    • http://files.broadoakmusic.uk/uploads/1/3/0/7/130775221/9052d67ab0b.pdf
    • https://cdn.shopify.com/s/files/1/0431/0568/1562/files/42406498812.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3545/files/71311150944.pdf
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/kavesexezilurujonosapamuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/0700/0219/files/fategamasufatuguripi.pdf
    • https://cdn.shopify.com/s/files/1/0427/3831/9527/files/shark_sewing_machine.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/12_cranial_nerves_and_functions.pdf
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/49450619142.pdf
    • https://cdn.shopify.com/s/files/1/0432/8289/0918/files/24910431698.pdf
    • https://cdn.shopify.com/s/files/1/0432/7738/5892/files/89259320590.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6397/files/mekigoluti.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/fubege.pdf
    • https://cdn.shopify.com/s/files/1/0429/1421/8143/files/juxuremevimeboratilarif.pdf
    • https://cdn.shopify.com/s/files/1/0429/1251/4201/files/kunexavesa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6879/2733/files/problem_statement_meaning.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055c8.bin
017c03e1a2c0c7452a93ee58556eaa014173fdb6ae734957fe217ad4a9b9f8a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55C8 5524 bytes
font_01_sfnt_off00006887.bin
82a83c26b91833c52181e8991cdf3aa2d14177d1991c79c8b99c7437a16b5cc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6887 11524 bytes

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