Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b843f718302cb58…

MALICIOUS

PDF

44.3 KB Created: 2020-08-09 22:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c97a9a512093d5eb22faa38fba83fe4 SHA-1: 675966e52200c41f42bb633a35ca79291d35d0b1 SHA-256: 6b843f718302cb58dec2728b77a7ecb03cb6b6f4a56999a03302d205f0ae7535
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.ru/pify?keyword=belcorp+peru+pdf'. The document body also contains this URL and other Shopify links, suggesting a lure to a malicious site disguised as a legitimate PDF. The ML classifier strongly flagged this PDF as malicious, supporting the presence of malicious content.

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=belcorp+peru+pdf
    • http://wetabodo.lipf.com/uploads/1/3/0/8/130873826/sonafin.pdf
    • http://files.jilesmemorialcogbf.org/uploads/1/3/2/6/132682862/jimovaz_woxavofiz_fenukenan.pdf
    • http://files.artsinhealth.wales/uploads/1/3/1/3/131381679/wojuji_rifodowebamino.pdf
    • http://files.oasystec.com/uploads/1/3/2/7/132710783/bewibigipapeg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/3395/9327/files/enterprise_application_architecture_patterns.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/lukozinizitukokinak.pdf
    • https://cdn.shopify.com/s/files/1/0432/3452/5347/files/zimetari.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5858/files/92979753875.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0119/files/cuento_de_caperucita_roja_de_los_hermanos_grimm.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/digivujoruxuveporideji.pdf
    • https://cdn.shopify.com/s/files/1/0437/9390/7869/files/gegazudojexidupalagewipo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7039/files/76198355274.pdf
    • https://cdn.shopify.com/s/files/1/0437/9662/7618/files/luvijuwebetanavox.pdf
    • https://cdn.shopify.com/s/files/1/0440/2656/0677/files/runiwa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4540/files/nitrogenous_bases_structure.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062fd.bin
293576ff5404f3ca11b9f16a3c3230df88aec408fdc160affcf1e82c930602d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62FD 4460 bytes
font_01_sfnt_off00007230.bin
26e3dedf17527080b9cfe4d67905ca720e1e34e9223dae2e7e78ac5dd476edce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7230 10596 bytes
font_02_sfnt_off0000965f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x965F 4324 bytes

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