Malicious PDF — malware analysis report

Static analysis result for SHA-256 5459c00f8be04c59…

MALICIOUS

PDF

51.3 KB Created: 2020-07-31 05:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd0429f68ae7685e643fb14c1a12ee74 SHA-1: a05335131a8389d933287e0fb9745b60be384cff SHA-256: 5459c00f8be04c59121c16982b9d1d5016a3d773678e47467d7cd3949bb3aaea
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector (ttraff.cc). The document body, though heavily obfuscated, suggests a lure related to 'Accreditation Canada international standards'. The presence of a link farm heuristic further indicates an attempt to distribute malicious content or phish users. The ML classifier 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=accreditation+canada+international+standards+pdf
    • http://files.legacy-systems.net/uploads/1/3/2/3/132303024/1053937.pdf
    • http://files.mndefenderwear.com/uploads/1/3/0/7/130775907/kozetowubidoberi.pdf
    • http://files.georgestewartartist.com/uploads/1/3/2/3/132302951/gexilumudizone-dijezo-nabogo-tujomubaza.pdf
    • https://cdn.shopify.com/s/files/1/0435/1551/0938/files/17052033135.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4493/files/50474816017.pdf
    • https://cdn.shopify.com/s/files/1/0432/9170/5500/files/roravowovato.pdf
    • https://cdn.shopify.com/s/files/1/0435/3989/0327/files/fimagifusimi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7814/files/xufalafaxigoxatosibogov.pdf
    • https://cdn.shopify.com/s/files/1/0440/2990/2998/files/6240982767.pdf
    • https://cdn.shopify.com/s/files/1/0433/4570/7162/files/12543025182.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4333/files/93300345696.pdf
    • https://cdn.shopify.com/s/files/1/0431/4434/7802/files/jifavuroxurato.pdf
    • https://cdn.shopify.com/s/files/1/0434/7258/4870/files/92043628645.pdf
    • https://cdn.shopify.com/s/files/1/0434/0826/1276/files/81625703381.pdf
    • https://cdn.shopify.com/s/files/1/0429/2699/7663/files/31491805903.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_off000070fe.bin
59753fe14437b6bd7ee9339d2e418091b4f9965c0dba0958150d90025cc5685e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70FE 7908 bytes
font_01_sfnt_off00008b20.bin
915928fcd330920cf0cdf5949a30c81ae7f3d5923f25f78591491f4dfbb60b8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B20 4928 bytes
font_02_sfnt_off00009bdf.bin
591daf801e7869118dcd2b1ebcc4e57eb554d61c429002bf8d07ba7df3de1b61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BDF 10404 bytes

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