Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e443969f7eb7e87…

MALICIOUS

PDF

47.2 KB Created: 2020-08-06 19:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed4afd2d10bbc7aac259f13aba8dad97 SHA-1: 896806212115d760e91624771573d7484f40480c SHA-256: 7e443969f7eb7e87d2238c18e5ed9b8216e8146ccbf475f9fbb679a6a9dcc13c
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service designed to obscure the final malicious destination. The primary heuristic indicates a link to a known malicious redirector, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to lure the user to a malicious site, likely for credential harvesting or malware delivery.

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=social+franchising+pdf
    • http://files.philippecorriveau.com/uploads/1/3/0/7/130739871/e10e893d8.pdf
    • http://files.shooplr.com/uploads/1/3/0/8/130874278/vizowepelid-jedaki-kazibijamekag.pdf
    • http://files.glennhousevr.com/uploads/1/3/0/9/130969235/8ece7e52b57c75.pdf
    • http://kawelid.nevacochranrd.com/uploads/1/3/0/9/130969332/874b103.pdf
    • http://files.boundlessk9.com/uploads/1/3/0/8/130813528/wuvufix-wusisufi-lejafafotu-penotubi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0715/6128/files/29531718297.pdf
    • https://cdn.shopify.com/s/files/1/0432/4956/5853/files/kikimoxaweke.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/66769899684.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tivaluzisezulumavolo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/tekejamitisolonizotamad.pdf
    • https://cdn.shopify.com/s/files/1/0439/4283/8427/files/wadixuguxegepisebokalise.pdf
    • https://cdn.shopify.com/s/files/1/0429/1641/3607/files/xolojafenigasoserer.pdf
    • https://cdn.shopify.com/s/files/1/0432/1338/9992/files/katowefesenibekuwezod.pdf
    • https://cdn.shopify.com/s/files/1/0435/3366/4408/files/31673556587.pdf
    • https://cdn.shopify.com/s/files/1/0437/6189/3534/files/the_witcher_3_bestiario_completo.pdf
    • https://cdn.shopify.com/s/files/1/0436/5628/2265/files/abbreviation_dictionary_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/1792/7837/files/kizesipexis.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6046/files/python_rename_columns.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_off00007a53.bin
f92df35ba580417fa886834d3979e057b06b5c13f545a95813653e517766f933		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A53 5520 bytes
font_01_sfnt_off00008d16.bin
010434214ed3709e15323b9105413a0ab8c74aa9dc7e90d4229bb0cd70cdae89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D16 10156 bytes

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