Malicious PDF — malware analysis report

Static analysis result for SHA-256 8281d8cf07738661…

MALICIOUS

PDF

44.3 KB Created: 2020-08-06 18:43:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e65589e276cf6353c811861f6dfe6ef SHA-1: d49591839ddeab826ffb48690a92ccc908dae118 SHA-256: 8281d8cf077386611caa0089b11200c1a1f756b7807fe7bc0fa9766954404fcb
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one identified as a malicious redirector, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to 'cheat code of gta vice city pdf' and references wkhtmltopdf, indicating it's likely a lure to entice clicks on the malicious URL. The presence of multiple PDF links also suggests a link farm for SEO manipulation or distributing further malicious content.

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=cheat+code+of+gta+vice+city+pdf
    • http://files.dyw-edinmideast.com/uploads/1/3/1/4/131454270/bc8986b.pdf
    • http://files.allaboutkidsdaycare.us/uploads/1/3/1/6/131607075/654311.pdf
    • http://tonusot.sardonicpoet.com/uploads/1/3/1/3/131398091/e19ecdf76a617bf.pdf
    • http://files.authoramyrichie.com/uploads/1/3/0/7/130740323/962638.pdf
    • http://files.eduexchange.org/uploads/1/3/0/7/130738593/4b237647fe45cf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/94000929718.pdf
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/pudabuxep.pdf
    • https://cdn.shopify.com/s/files/1/0429/8578/3447/files/tumazumemib.pdf
    • https://cdn.shopify.com/s/files/1/0435/4749/2506/files/64014909938.pdf
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/xavusogevuteterinetage.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6841/files/gexutumivujemugo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8941/2764/files/xewabikamivumepuve.pdf
    • https://cdn.shopify.com/s/files/1/0431/2642/3701/files/vixezesaxakefopubefajiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/0682/7428/files/ti_84_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3164/1762/files/wizifaronasu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/35097557769.pdf
    • https://cdn.shopify.com/s/files/1/0439/1275/7400/files/52251859525.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_off00006fd8.bin
acbb671279c299c065ce99d67d3606a94280de10b5a8e6ff74380a5d078bdb05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD8 5180 bytes
font_01_sfnt_off0000818b.bin
51358c14672538bdb083a83999887ef46daaf59f2ae36d7364cf65a461e1880a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x818B 10144 bytes

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