Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a8cd18de30d4ed3…

MALICIOUS

PDF

51.4 KB Created: 2020-08-06 20:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c75847ef6df6b5ec61ba3b33f40ca56f SHA-1: 9076388d553346e94c018d208a3b6f3c2f01a7b5 SHA-256: 7a8cd18de30d4ed36fb2170f3789f7811193af5a77e08f5894e085c604c5712a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a deceptive link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to "Certified ethical hacker training pdf" and a URL that appears to be part of a link farm, suggesting a phishing or scam attempt. The ML classifier also 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.com/pify?keyword=certified+ethical+hacker+training+pdf
    • http://files.timbertheft.org/uploads/1/3/1/3/131383478/vebarurogafak.pdf
    • http://files.brownfieldselementary.com/uploads/1/3/0/8/130813781/8b5b0cb.pdf
    • http://zekikax.seatgear.co.uk/uploads/1/3/2/7/132710797/niketaxatobusag-vabelowitaroz.pdf
    • http://dalamer.goleakdetectives.com/uploads/1/3/2/6/132682787/0053b7a8a21.pdf
    • http://files.arilaurakreith.com/uploads/1/3/0/9/130968943/8560670.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8686/3783/files/70675032887.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3282/files/78210217474.pdf
    • https://cdn.shopify.com/s/files/1/0432/6142/7876/files/35794836361.pdf
    • https://cdn.shopify.com/s/files/1/0436/9996/2024/files/dojage.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/88096987360.pdf
    • https://cdn.shopify.com/s/files/1/0430/8008/9760/files/3997430356.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/2002/files/catalogo_andrea_botas_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/6416/4506/files/47095475727.pdf
    • https://cdn.shopify.com/s/files/1/0429/0487/9271/files/47434803172.pdf
    • https://cdn.shopify.com/s/files/1/0431/0394/4858/files/46872364750.pdf
    • https://cdn.shopify.com/s/files/1/0427/8353/9366/files/4768414979.pdf
    • https://cdn.shopify.com/s/files/1/0432/8400/5032/files/30056182618.pdf
    • https://cdn.shopify.com/s/files/1/0434/8212/0357/files/wuzedisotelabusobovu.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_off00008948.bin
e1fbeb26719388efa9e56a929570b383c6f33306d1983c4e71e12c3166a4791b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8948 5208 bytes
font_01_sfnt_off00009afa.bin
547dff568ac25ba13b9a0454c66975457576cd499147e1835f694545d8041d38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AFA 10848 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.