Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a78feb42dd7587…

MALICIOUS

PDF

45.3 KB Created: 2020-08-10 07:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3b3639db73cce52cf77c14c253f93cb SHA-1: 03dd59eaf1b4189a9eff4dd1f083a3c9dc790345 SHA-256: 02a78feb42dd7587c0f36f95c048c7c08705733c8fd04b9cd3392312ae3179a6
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=arbitrage+trading+strategies+pdf', suggesting a lure to a scam or phishing page. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=arbitrage+trading+strategies+pdf
    • http://files.mayusilkart.org/uploads/1/3/1/3/131383664/2245704.pdf
    • http://vezatofa.wildheartmustangs.com/uploads/1/3/1/6/131606490/1e9f780b6360d3.pdf
    • http://files.uwacumedia.com/uploads/1/3/1/0/131070572/sodatixotugarelilol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1762/3957/files/breviarium_romanum_1962.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8726/files/dizinufukat.pdf
    • https://cdn.shopify.com/s/files/1/0429/8817/5519/files/99833987894.pdf
    • https://cdn.shopify.com/s/files/1/0432/0857/3091/files/11392953501.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/economist_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/getapukewedawakazixa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/simpson_diversity_index.pdf
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/jevewit.pdf
    • https://cdn.shopify.com/s/files/1/0436/3055/9390/files/mathematics_for_economic_analysis_sydsaeter.pdf
    • https://cdn.shopify.com/s/files/1/0429/9676/0730/files/govem.pdf
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/pevedujolesofofedabo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2693/2124/files/tuvudikujuviwazokexe.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_off0000748f.bin
ae01f3952b293b1ff6a1f663e420e7fc1d0ce0b38b93a632cdf59731358ad103
pdf-font-stream PDF embedded font (sfnt) at offset 0x748F 5308 bytes
font_01_sfnt_off000086a7.bin
896119dbeba9cc0fd320dc4842c73a2e909120be9ac7548d1cfc156783ffa6d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x86A7 9924 bytes