Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ad1f012053421a…

MALICIOUS

PDF

48.4 KB Created: 2020-08-20 03:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72bdddb7e9f4ad4b41b2d76e6de7e2c2 SHA-1: 3c4368930117a678e8b3466f978d6a94677ab847 SHA-256: 11ad1f012053421aafd09712d7fb4d924a1986e7d3f9a936a0e99fb07526cf47
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as educational content. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, many of which point to benign Shopify URLs, likely to mask the malicious redirector. The ML classifier strongly flagged this PDF as malicious, supporting the observed malicious 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.cc/pify?keyword=square+root+and+cube+root+practice+worksheets
    • http://vimexarik.dailydigitalclub.net/uploads/1/3/1/4/131407995/0bacb5b9eb7555f.pdf
    • http://xewavemer.jaxpots.com/uploads/1/3/1/3/131381135/1456045.pdf
    • http://files.empoweringautismcaregivers.com/uploads/1/3/1/3/131384113/3864971.pdf
    • http://files.dunphyshandguntraining.com/uploads/1/3/2/6/132681566/d354c601d.pdf
    • http://junus.boaianimalcentre.org/uploads/1/3/1/6/131606739/8711262.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/5920/6561/files/voxupotodigibof.pdf
    • https://cdn.shopify.com/s/files/1/0431/6315/6641/files/supplies_company_profile_sample.pdf
    • https://cdn.shopify.com/s/files/1/0429/8106/4853/files/mafoluzo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6630/2357/files/positive_character_traits.pdf
    • https://cdn.shopify.com/s/files/1/0436/0490/2045/files/pedakegidurebolofagekam.pdf
    • https://cdn.shopify.com/s/files/1/0428/8849/5270/files/management_of_febrile_neutropenia.pdf
    • https://cdn.shopify.com/s/files/1/0437/4623/0426/files/agronomy_terminology_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/9333/5970/files/abnormal_psychology_disorders.pdf
    • https://cdn.shopify.com/s/files/1/0432/3042/9352/files/lokexejixasakiru.pdf
    • https://cdn.shopify.com/s/files/1/0428/7443/7791/files/anti_dumping_measures.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ab0.bin
b7949e6b5f60b4b4763a9beb0f513c19a8cbd05cd6b727594822fa856b845b82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB0 5536 bytes
font_01_sfnt_off00006d7b.bin
5dd0d001883ed82e4d018c11ba22a20b5f4d1ee35f09c2a682586a3f9ac79240		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D7B 10120 bytes
font_02_sfnt_off00009042.bin
273914036045da1d397219418389fe67fd6e0f6cf1cb6f4199ca44d81d4651f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9042 16236 bytes
font_03_sfnt_off0000a59d.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA59D 4324 bytes

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