Malicious PDF — malware analysis report

Static analysis result for SHA-256 537d80f742af9377…

MALICIOUS

PDF

71.1 KB Created: 2020-08-06 15:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9d1c5cd82120a74268d0699af915443 SHA-1: 29712315a7cbfbaccb63d66b6b3b94f633d57a0c SHA-256: 537d80f742af93779bdd51d4622e34f187808f226f64b8cbad1bb99e2c685080
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=libro+de+canciones+infantiles+para+imprimir+pdf'. Additionally, another critical heuristic indicates a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to lure the user to a malicious site.

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.ru/pify?keyword=libro+de+canciones+infantiles+para+imprimir+pdf
    • http://files.marketconsultantsonline.com/uploads/1/3/2/6/132695862/261110.pdf
    • http://files.cherisher.org/uploads/1/3/1/4/131454816/zitukuluz-nizafavigifox-pumonukagiv.pdf
    • http://files.colinrmorrison.com/uploads/1/3/1/0/131070317/87029.pdf
    • http://files.michaeloministries.org/uploads/1/3/1/4/131406075/miwodoviva.pdf
    • http://files.flyingsamaritanselhongo.org/uploads/1/3/0/7/130739328/pagalegapabuvu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/14618486478.pdf
    • https://cdn.shopify.com/s/files/1/0434/9375/2997/files/nabegum.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/sesiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/demovabuxufatavaka.pdf
    • https://cdn.shopify.com/s/files/1/0440/7204/2661/files/95675914234.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/vevele.pdf
    • https://cdn.shopify.com/s/files/1/0427/8157/3279/files/diwezodanojamuxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/telisupuf.pdf
    • https://cdn.shopify.com/s/files/1/0438/9535/7595/files/analise_combinatoria_morgado.pdf
    • https://cdn.shopify.com/s/files/1/0430/2202/4867/files/41342237296.pdf
    • https://cdn.shopify.com/s/files/1/0447/8458/2813/files/avd_video_downloader.pdf
    • https://cdn.shopify.com/s/files/1/0440/7151/8373/files/fetudumejegapos.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4014/files/27039853188.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85947343199.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_off0000c5c6.bin
038b2890d2593104b72cede987f5405a60fe6ee87f49b49cc329c17fb1dc2fc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C6 5384 bytes
font_01_sfnt_off0000d7fd.bin
5aeb9fa37ca3c1af6d2e5596a46948ed3ae0181e76e232495c469bc2aaf47bd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FD 17632 bytes

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