Malicious PDF — malware analysis report

Static analysis result for SHA-256 81dab4baa72745bd…

MALICIOUS

PDF

42.6 KB Created: 2020-07-09 17:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ee9c3da53e4113b08c5962efddd51cc SHA-1: ade3d46513bf33117c53e63694ccce19a2d10b53 SHA-256: 81dab4baa72745bd9c8421a3e4bf17a59f2b25c0bd4bd3c30ff925edbf18d4a4
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to suspicious domains and are likely part of a link farm designed to manipulate search engine results or redirect users to malicious content. One critical heuristic identified a link to known malicious redirector infrastructure. The document body itself contains obfuscated text and the primary URL, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/wb?keyword=perbedaan%20statistika%20parametrik%20dan%20non%20parametrik%20pdf
    • http://files.finksdeli.org/uploads/1/3/2/7/132741222/5b0259.pdf
    • http://files.maddiecranston.com/uploads/1/3/2/8/132815118/9015901.pdf
    • http://files.inrarefiedair.com/uploads/1/3/1/4/131407629/b063a1956fd.pdf
    • http://files.ict-conferance.org/uploads/1/3/1/3/131379049/2300739.pdf
    • http://files.thepoetrypeople.co.nz/uploads/1/3/1/8/131856293/c4b2d6a90457352.pdf
    • http://files.dictionaerie.com/uploads/1/3/1/4/131452991/wikuvuzeg_palezumudoxuna_fasobivul.pdf
    • http://files.energysmartacademy.com/uploads/1/3/0/7/130739174/d6844.pdf
    • http://files.sbtravelbureau.com/uploads/1/3/1/8/131871677/silamotidi_zawezusokurudo_saregit.pdf
    • https://kolodepigom.files.wordpress.com/2020/07/fixixoxer.pdf
    • https://zetirufim.files.wordpress.com/2020/06/tanojapinujigaviz.pdf
    • https://budixifanedo.files.wordpress.com/2020/06/14944949817.pdf
    • https://tovuwaxupu.files.wordpress.com/2020/07/62560167824.pdf
    • https://latavewudewe.files.wordpress.com/2020/07/83429465771.pdf
    • https://zolibuvove523289473.files.wordpress.com/2020/06/9722650550.pdf
    • https://zopowozofoje.files.wordpress.com/2020/06/nikuxuxof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuwakuda.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44603331863.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54686169254.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6565103434.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068ee.bin
e052eaa7e29aa80409271651fd826635f572d59b6e2edd80b7ae246ada38971a
pdf-font-stream PDF embedded font (sfnt) at offset 0x68EE 5148 bytes
font_01_sfnt_off00007a46.bin
ca81f09d36bcab3227da0326b3c69e6a178cf31afcc42de780a9af8112170422
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A46 10200 bytes