Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab05816f5dab23e…

MALICIOUS

PDF

44.1 KB Created: 2020-08-12 19:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fbc48d156fa11a6eaddd5e1c7b5558b SHA-1: fc1a2a8869a99f88837772a4fa5ad773b6a89d4d SHA-256: 6ab05816f5dab23ee79908abc1af49a0b59f16235f853985ab820cb1b6d00e48
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to a redirector service. The primary malicious URL identified is ttraff.com, which is known for malicious redirection. The document body itself is heavily obfuscated and contains embedded URLs, further supporting the malicious intent of redirecting users to potentially harmful sites.

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=corner+bakery+cafe+menu+pdf
    • http://files.reflexinstitute.ca/uploads/1/3/1/0/131071256/1431724.pdf
    • http://files.gem-uk-properties.com/uploads/1/3/1/4/131453206/3b488675bbf.pdf
    • http://files.stcatherineofalexandriachurch.com/uploads/1/3/1/4/131437225/924715.pdf
    • http://files.hallielee.com/uploads/1/3/2/8/132815961/5788720.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5093/3155/files/dd_form_1149.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/lolojimomonobozot.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5149/files/sixufanusofuvagiw.pdf
    • https://cdn.shopify.com/s/files/1/0445/5848/3620/files/tortoise_svn_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3845/files/9401610684.pdf
    • https://cdn.shopify.com/s/files/1/0432/2603/8433/files/cummins_n14_ecm_wiring_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/piwenepigixi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7832/8221/files/80242839815.pdf
    • https://cdn.shopify.com/s/files/1/0435/4146/3204/files/panera_allergen_menu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/84352485314.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_off00006eee.bin
fd93710bbfb00ba803062db5a92f958b06d5f1631071123a4d18aabfb1675880
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEE 5300 bytes
font_01_sfnt_off000080e3.bin
41628dc503bf36f5bef899d8a8a0c3e7c27d29e312a7f64bc4d97050f842c741
pdf-font-stream PDF embedded font (sfnt) at offset 0x80E3 10128 bytes