Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ea7026d8f78f5f…

MALICIOUS

PDF

38.4 KB Created: 2020-07-22 08:37:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a70a03c7df0d9c26539a56bc5fe41363 SHA-1: f2e2848f75d1fab6119accc2a60433ad8c685909 SHA-256: 07ea7026d8f78f5ffd73572c5e2247069dc9a2d8a9ff0a2e10caa813875c3ba3
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to redirector infrastructure, indicating a link farm or phishing attempt. The primary URL, 'https://ttraff.cc/pify?keyword=pdf+document+translation+software+free+download', suggests a lure for users seeking software. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector.

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=pdf+document+translation+software+free+download
    • http://files.camco-stores.com/uploads/1/3/2/6/132695216/vemege-pexatugabik-runekut-wetapobitiw.pdf
    • http://files.jcroofingspecialists.com/uploads/1/3/0/7/130775511/nalesewegipipuw_movukewuzovufis_pozakerajute.pdf
    • http://files.raphastar.com/uploads/1/3/0/7/130775918/81aa9810fbb3.pdf
    • http://files.allyjadeart.com/uploads/1/3/2/6/132696465/jofadivagikupib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54440827626.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/jufodelefexowokuvipel.pdf
    • https://cdn.shopify.com/s/files/1/0430/3113/4365/files/fevupade.pdf
    • https://cdn.shopify.com/s/files/1/0431/2114/8061/files/xofasibizap.pdf
    • https://xepodifi.files.wordpress.com/2020/06/dediwesilafu.pdf
    • https://wididoripelo.files.wordpress.com/2020/07/5126562723.pdf
    • https://redowitizeti731189369.files.wordpress.com/2020/07/34827530986.pdf
    • https://miloxeraf.files.wordpress.com/2020/06/76761523135.pdf
    • https://negowonot.files.wordpress.com/2020/06/zawuvebujunopum.pdf
    • https://cdn.shopify.com/s/files/1/0434/5852/7397/files/wofoxol.pdf
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/jedix.pdf
    • https://cdn.shopify.com/s/files/1/0429/6884/2393/files/logabevakekosutabivugajod.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/46416162683.pdf
    • https://cdn.shopify.com/s/files/1/0436/9747/1656/files/68590787320.pdf
    • https://cdn.shopify.com/s/files/1/0430/0875/3827/files/ragekudajurakotojak.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_off0000589f.bin
b275fd3775b3c6b34eb4c2082df2be701dbcda65ff72374d94eb3da3f0c9411b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x589F 5144 bytes
font_01_sfnt_off00006a05.bin
5911d629328cb834f624bd28c12ae859a6f941569a68dc997bc281e8f4983713		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A05 9384 bytes

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