Malicious PDF — malware analysis report

Static analysis result for SHA-256 7afe52668166a885…

MALICIOUS

PDF

39.7 KB Created: 2020-08-16 01:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98f27a490172a3224e6720f4440c7f31 SHA-1: dc67443f671ddbe75948adec498d212c712720dd SHA-256: 7afe52668166a8850b7afe418e0ca3ea93fe34577923b5017297fec3daf96ba3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to malicious infrastructure, disguised as a 'personal cv powerpoint template free'. This heuristic, combined with the ML classifier, indicates a malicious intent to redirect users. The document body, though heavily obfuscated, contains the same lure URL. No scripts were extracted from this sample.

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.com/pify?keyword=personal+cv+powerpoint+template+free
    • http://bugonuve.japanesewarcrimesmalayaborneo.com/uploads/1/3/1/1/131164250/berodideredag.pdf
    • http://lukonewad.relentlessknitting.com/uploads/1/3/0/8/130874359/dexiw_negutalip_kituzejofasede.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9896/4117/files/17445411593.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/dakudewuvu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0630/4153/files/logistic_regression_spss_interpretation.pdf
    • https://cdn.shopify.com/s/files/1/0431/3684/3933/files/65670341800.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0626/files/astm_a534_04.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/training_manual_template_indesign.pdf
    • https://cdn.shopify.com/s/files/1/0435/0020/8294/files/nc_durable_power_of_attorney_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/1955/1388/files/89092273775.pdf
    • https://cdn.shopify.com/s/files/1/0429/0235/6127/files/86140954359.pdf
    • https://cdn.shopify.com/s/files/1/0438/4679/5424/files/valspar_brush_pearl.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_off00005e45.bin
16081065ed43717e2851dcd016dc67286035a4e2d45035c9b6ce68f441e40471
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E45 5316 bytes
font_01_sfnt_off00007058.bin
d42e8c03a5a90df1b72d7883ba04ed93278ba3ddf432d02b992c6ccb4361db49
pdf-font-stream PDF embedded font (sfnt) at offset 0x7058 9900 bytes