Malicious PDF — malware analysis report

Static analysis result for SHA-256 79253ddaed081b60…

MALICIOUS

PDF

42.7 KB Created: 2020-08-18 14:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3c6930353ef0da7d532e2c1e79a98e5 SHA-1: f9df3308a2c2b48ad6fb54e34a50103d33e184b5 SHA-256: 79253ddaed081b6097f9ac03e14706b6f3309a53c7fa2d5f542fac9d71b690f4
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a redirector URL, suggesting a phishing or malware distribution attempt. The document body text, though partially corrupted, includes the phrase 'Arjun kanungo songs ek dafaa' and the redirector URL, indicating a lure to disguise malicious activity. 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=arjun+kanungo+songs+ek+dafaa
    • http://files.luciecerna.com/uploads/1/3/2/6/132695416/romel.pdf
    • http://lelabakep.smithandwebb.com/uploads/1/3/1/4/131453215/kexuvu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5655/4394/files/68744135334.pdf
    • https://cdn.shopify.com/s/files/1/0432/3128/1312/files/40678891529.pdf
    • https://cdn.shopify.com/s/files/1/0431/6774/4160/files/79654373046.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4705/files/rabumisofoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1044/9830/files/31370848810.pdf
    • https://cdn.shopify.com/s/files/1/0429/8581/6218/files/57140730930.pdf
    • https://cdn.shopify.com/s/files/1/0431/2013/2257/files/74707391501.pdf
    • https://cdn.shopify.com/s/files/1/0435/9726/7112/files/types_of_behavioural_management_approach.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/totil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/50036278562.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_off00005b28.bin
efbfceacc56a68648eaa70123f644923d5d6cd06d819d350aacaedf199851a40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B28 5172 bytes
font_01_sfnt_off00006cd2.bin
e70c3e6555a7fb4060caf8d962eb56e3cd22f0d4095a83877d9b83b4f7bb40d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD2 15660 bytes

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