Malicious PDF — malware analysis report

Static analysis result for SHA-256 1076e2414f9c7857…

MALICIOUS

PDF

47.3 KB Created: 2020-07-30 08:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d4d50334366a151d73aada6a65d0258 SHA-1: c917f37d7d1589b033ba40bbc4a85c8f13bc405a SHA-256: 1076e2414f9c785775b6c9e46b5152ecb2fc15c50d30b6bc0c3925f2c5d2ec19
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. The document body, though heavily obfuscated, suggests a lure related to 'Captopril davis plus pdf'. The presence of a link farm and a critical heuristic firing for malicious redirector infrastructure indicates an attempt to lead the user to harmful content, likely for phishing or malware distribution.

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=captopril+davis+plus+pdf
    • http://files.envisiononeness.com/uploads/1/3/1/3/131397955/4393308.pdf
    • http://files.grizzyathletics.com/uploads/1/3/2/6/132681033/8485945.pdf
    • http://files.c60ultrapure.com.au/uploads/1/3/1/4/131452878/6173070.pdf
    • http://files.boutiqueroomphuket.com/uploads/1/3/1/8/131856186/kogitesudan_beven.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1370/9730/files/xalunenovurimana.pdf
    • https://cdn.shopify.com/s/files/1/0434/5892/0605/files/remobudome.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7580/files/dapuvejijapub.pdf
    • https://cdn.shopify.com/s/files/1/0433/7824/5781/files/16427136735.pdf
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/koxewituzululajokine.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/xapeworom.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/vukemoxolozugufuzibevub.pdf
    • https://cdn.shopify.com/s/files/1/0436/0595/0626/files/12631480961.pdf
    • https://cdn.shopify.com/s/files/1/0435/9228/6363/files/11258326428.pdf
    • https://cdn.shopify.com/s/files/1/0432/8144/9118/files/mupodamenone.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3781/files/difumodojiberapuzos.pdf
    • https://cdn.shopify.com/s/files/1/0434/8664/2338/files/sumilelabasur.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/88445111532.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_off00007cdf.bin
7846db1530260b30cc209ceaccdd3458fe49363a6d8e610a9dff73535a353733		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDF 4776 bytes
font_01_sfnt_off00008d30.bin
bf7a700f3cedd1c9d7cf4790e6d6015302da2e90193b43cc01e9a3cacaca7699		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D30 10180 bytes

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