Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af1f30a7d80c884…

MALICIOUS

PDF

48.8 KB Created: 2020-08-03 09:29:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47a00a4c66604749d1c67e0ee6b73395 SHA-1: c75841d4fd9794203420e2ee0266231f4ccbed4f SHA-256: 0af1f30a7d80c884f1b6bdb3881c3f28f5e6883b4cb2418336fc8f4ea1c85dea
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external resources. One of the primary links, 'https://ttraff.ru/pify?keyword=wipeout+season+7+episode+16', is identified as malicious redirector infrastructure. The document body itself contains obfuscated text and references to a TV show, likely as a lure to encourage users to click on the embedded links. The presence of numerous PDF links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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.ru/pify?keyword=wipeout+season+7+episode+16
    • http://files.unicornmills.org/uploads/1/3/1/4/131437599/tuzeta.pdf
    • http://files.shopbrickroad.com/uploads/1/3/1/3/131398144/kadopajid_lazatonut_jibawopub.pdf
    • http://files.rabbithatdesigns.com/uploads/1/3/0/7/130740262/duwowelevaz_jutudej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2390/9532/files/zibulazuxufulagabulinuvem.pdf
    • https://cdn.shopify.com/s/files/1/0441/1323/2024/files/movupikejekutudox.pdf
    • https://cdn.shopify.com/s/files/1/0429/7228/3033/files/99709871328.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/gonegifo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4456/9242/files/jajelobusukix.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5522/files/77032570795.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/wogikamoxul.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/remawojuniwidalawigisu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7912/2587/files/85655544802.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/94997139347.pdf
    • https://cdn.shopify.com/s/files/1/0433/4708/3429/files/27088806217.pdf
    • https://cdn.shopify.com/s/files/1/0434/8893/6102/files/95460090346.pdf
    • https://cdn.shopify.com/s/files/1/0434/7969/5517/files/rovalunix.pdf
    • https://cdn.shopify.com/s/files/1/0432/6309/9040/files/63964333311.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_off00008122.bin
27e8939298788684e932ca9c8682c54f0e5faaa1765e08eb32cc6ec907f34660		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8122 5124 bytes
font_01_sfnt_off000092be.bin
372b57d18b228b03270a2968f7a07e17c7c227b829cf5b2db6d2fd9b4105eaed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92BE 10312 bytes

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