Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f4d02ea7025e478…

MALICIOUS

PDF

42.4 KB Created: 2020-08-11 05:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de2f4b2737e4bddb354bc0d9d1038e33 SHA-1: 1c4c708c590fb04068022114465c4b4e8861c2fa SHA-256: 6f4d02ea7025e47872343fcef57c18e9920e47d34fe5881bbe5e9b893c6ce7f6
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a link farm designed to manipulate search engine results. One prominent link directs to a known malicious redirector, 'ttraff.cc', which is likely used to funnel victims to further malicious content. The ML classifier strongly indicated maliciousness, supporting the presence of these malicious links.

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.cc/pify?keyword=public+speaking+skills+for+students+pdf
    • http://xinamoj.kansasnursingstudents.org/uploads/1/3/1/6/131636725/fesirir.pdf
    • http://files.arespta.org/uploads/1/3/2/8/132814119/5046027.pdf
    • http://fadan.projectnohunger.org/uploads/1/3/1/1/131164250/2213426.pdf
    • http://kikab.dunollycottage.com/uploads/1/3/1/3/131380600/wezerevusu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2317/9677/files/arabic_words_to_english_translation.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4464/files/54713605803.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/nimezefusebowal.pdf
    • https://cdn.shopify.com/s/files/1/0432/9183/6566/files/34108442992.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/xogimunurek.pdf
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/wide_eye_meme.pdf
    • https://cdn.shopify.com/s/files/1/0437/3748/1365/files/46592534999.pdf
    • https://cdn.shopify.com/s/files/1/0430/7399/4905/files/sovuge.pdf
    • https://cdn.shopify.com/s/files/1/0434/3437/7377/files/641647133.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17612659915.pdf
    • https://cdn.shopify.com/s/files/1/0438/5118/6336/files/pathfinder_burnt_offerings_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/itextsharp_convert_html_to.pdf
    • https://cdn.shopify.com/s/files/1/0436/8531/4715/files/icp_discography_kickass.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0840/files/5805821355.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/229905594.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_off00006682.bin
764a52aca5d74a8ccc971508f8112e43913a37c75e52f7fc51fa9963f1d1ee84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6682 5528 bytes
font_01_sfnt_off0000794f.bin
24275221386c0883f47dd39e6f39393ca7248253196b10a7ad9a8a488af651f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x794F 10300 bytes

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