Malicious PDF — malware analysis report

Static analysis result for SHA-256 007e17fc81135658…

MALICIOUS

PDF

41.1 KB Created: 2020-08-11 15:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a72fe9aa77efdce5f4c9694748cd5f98 SHA-1: 23cb4baa24cdb1e36355326d45d2da479725b70f SHA-256: 007e17fc811356580d9501aa8e9c479c223a26da50bdf4f2f4d065e6616c30ff
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, indicating a phishing or malware distribution attempt. The document body and embedded links suggest a lure related to 'desulfator circuit pdf', likely intended to trick users into clicking the malicious URL. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=desulfator%20circuit%20pdf
    • http://files.c60ultrapure.com.au/uploads/1/3/1/4/131438583/62055a31ae.pdf
    • http://files.d7motorsports.com/uploads/1/3/0/8/130813953/zuxifirakire_pesuliped_sejug.pdf
    • http://bikuko.sepamujer.org/uploads/1/3/1/1/131164250/karogoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0602/4101/files/cell_and_molecular_biology_karp.pdf
    • https://cdn.shopify.com/s/files/1/0431/4457/7178/files/wofijaworapuzasikid.pdf
    • https://cdn.shopify.com/s/files/1/0429/9679/3503/files/15199943850.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9670/files/wixidavomaruvukenukav.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8782/files/53550169810.pdf
    • https://cdn.shopify.com/s/files/1/0428/8921/6167/files/dupijoboposumibazewake.pdf
    • https://cdn.shopify.com/s/files/1/0433/7860/6229/files/mojonogatapojikagelugixep.pdf
    • https://cdn.shopify.com/s/files/1/0430/7487/9641/files/65216529449.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2785/files/dimewovurelewisugo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10217245918.pdf
    • https://cdn.shopify.com/s/files/1/0431/3468/1250/files/bopemik.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_off00006320.bin
0786976f1ce59788feb9b889bf2048d79700bc851ee76a85206181c6342e7313
pdf-font-stream PDF embedded font (sfnt) at offset 0x6320 5148 bytes
font_01_sfnt_off000074b3.bin
75b0d680fbea395a0162371727a6efdb86d243e3ce2c9ea89eed9b80206eef96
pdf-font-stream PDF embedded font (sfnt) at offset 0x74B3 10304 bytes