Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ef195de5744708…

MALICIOUS

PDF

40.7 KB Created: 2020-08-01 16:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2a3f9c706a04c2753ba2855c4d89545 SHA-1: 6259a9e818ab429c0ceea528280a828273f695cf SHA-256: 68ef195de5744708a6d1532780a78129c8cacdaea3fd60497b3e257c8614d28f
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service, indicating a link farm or phishing attempt. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to direct users to malicious content, likely for further exploitation or credential harvesting.

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=python+turn+list+into+string
    • http://files.asktrainingsource.com/uploads/1/3/0/9/130969427/sefebanesigi.pdf
    • http://files.laneanimalhosp.com/uploads/1/3/1/6/131606408/murajaxosa_kalata_medazexoreraret_wibuvuweje.pdf
    • http://files.craftylifestyle.co.uk/uploads/1/3/1/3/131383771/da87aca.pdf
    • http://files.songarchiveproject.com/uploads/1/3/0/7/130740221/mutowe.pdf
    • http://files.iconiacapital.com/uploads/1/3/1/1/131163980/6592454.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/0522/0763/files/16355876479.pdf
    • https://cdn.shopify.com/s/files/1/0429/9839/9139/files/24084050198.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/34935261995.pdf
    • https://cdn.shopify.com/s/files/1/0437/7437/8138/files/kikodumibiwalumamipumugab.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4827/files/wumifovofilugoboz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/71931422994.pdf
    • https://cdn.shopify.com/s/files/1/0436/4828/6880/files/56569692382.pdf
    • https://cdn.shopify.com/s/files/1/0440/5651/0616/files/futulawirefewiworokos.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6909/files/dadabibizo.pdf
    • https://cdn.shopify.com/s/files/1/0438/6773/4176/files/73862855795.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/59996340655.pdf
    • https://cdn.shopify.com/s/files/1/0427/7541/2902/files/fevugakokixa.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_off00005da2.bin
3dbf8ffb27f5032382db4fe2fe48685f8600a30ce8b22cd703c89a5320745bab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA2 4840 bytes
font_01_sfnt_off00006e22.bin
f47fb907df526db4d39fa4737320c4cdb7825e5d7d760ad206682444187362f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E22 12448 bytes

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