Malicious PDF — malware analysis report

Static analysis result for SHA-256 e86d7b872693d21e…

MALICIOUS

PDF

44.5 KB Created: 2020-08-21 04:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4544d1ebaf8cad1054ac1d0aacaea75 SHA-1: 2ce030b5bfbe124812fc3483d37a6e071b88f192 SHA-256: e86d7b872693d21efdde5a83799cca8bbb8b68d56e702773edd6231d86b49eda
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which are designed to appear as legitimate documents but lead to external sites. One of the primary links directs to a known malicious redirector, 'ttraff.cc', indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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=queen+bohemian+rhapsody+partitura+pdf
    • http://tipuram.simplelifeofseven.com/uploads/1/3/0/7/130775934/rojewolewikojap_lezudopiwam.pdf
    • http://files.youthultimateprogram.org/uploads/1/3/1/4/131437515/weluwef_sizuwagepikosix.pdf
    • https://cdn.shopify.com/s/files/1/0457/5831/6700/files/data_analysis_example_in_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/libidurekatomanazavevufi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/31773098083.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0835/files/computer_abbreviations_and_their_meanings.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4628/files/logistica_y_cadena_de_suministro_libro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67331216746.pdf
    • https://cdn.shopify.com/s/files/1/0439/0515/5224/files/scavenger_s_guide_to_droids.pdf
    • https://cdn.shopify.com/s/files/1/0432/2574/3521/files/areas_development_performance_review_examples.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1724/files/46249819174.pdf
    • https://cdn.shopify.com/s/files/1/0429/9125/5713/files/15638486579.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_off0000620d.bin
7e1186eabaa31d2fb8f4510fd014177e013ad032d947f52feb61fb74c45bcf97
pdf-font-stream PDF embedded font (sfnt) at offset 0x620D 5432 bytes
font_01_sfnt_off00007448.bin
474d6cc09bbee3c231a4bcaa4c63e4705ab631ddb518ad2b9ab0a2f16677e863
pdf-font-stream PDF embedded font (sfnt) at offset 0x7448 10276 bytes
font_02_sfnt_off000096fb.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x96FB 4324 bytes