Malicious PDF — malware analysis report

Static analysis result for SHA-256 6128a9118ed9aa66…

MALICIOUS

PDF

44.5 KB Created: 2020-08-22 14:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1369403863441a66a4427f8c59c23b5b SHA-1: 8b9092491a436a2ef4e6c7d12078a1fa4958ad3f SHA-256: 6128a9118ed9aa66706588baa960471d95ecfd5fe913f86ddd657421e1a9508e
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to external PDF files, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to known malicious redirector infrastructure, specifically `https://ttraff.com/pify?keyword=bremsweg+anhalteweg+reaktionsweg+formeln`. The document body, though heavily obfuscated, also contains this URL, indicating the primary intent is to redirect the user to malicious content. No scripts were extracted, but the presence of malicious redirector links and the ML classifier's high confidence score support the malicious verdict.

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=bremsweg+anhalteweg+reaktionsweg+formeln
    • http://files.southamptonelempto.com/uploads/1/3/2/7/132712163/limopukozedamam.pdf
    • http://jipef.badshahdesign.net/uploads/1/3/1/4/131438366/431619e4c6b.pdf
    • http://files.goldlawcolorado.com/uploads/1/3/1/0/131071114/saxov.pdf
    • http://files.tiloscleanwater.com/uploads/1/3/0/9/130969182/8163648.pdf
    • http://files.nightofthelivingdead-themusical.com/uploads/1/3/0/7/130739833/jetaxavilubeloxos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/ridasaton.pdf
    • https://cdn.shopify.com/s/files/1/0432/6745/7188/files/89205967291.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nagexonulelaxefirulilona.pdf
    • https://cdn.shopify.com/s/files/1/0449/6569/1560/files/35924250867.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/95289035869.pdf
    • https://cdn.shopify.com/s/files/1/0433/4161/1159/files/adobe_audition_cs6_tutorial_francais.pdf
    • https://cdn.shopify.com/s/files/1/0438/7792/5019/files/xetofufekilati.pdf
    • https://cdn.shopify.com/s/files/1/0435/3648/2458/files/risotabopib.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/47607255724.pdf
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/bewunig.pdf
    • https://cdn.shopify.com/s/files/1/0436/1909/0595/files/speed_velocity_and_acceleration_problems.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_off00006f9f.bin
262ce59e7d037f5bf52df08f6d2bafd45d2e9054fb001e4e0a48a7f008617a47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9F 5388 bytes
font_01_sfnt_off000081d4.bin
73187f607e95985bb4515a2f783062353da93b76af27f55a5a6d295e46030283		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81D4 10616 bytes

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