Malicious PDF — malware analysis report

Static analysis result for SHA-256 82432192a05e45fd…

MALICIOUS

PDF

127.4 KB Created: 2020-09-07 20:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c200580b4e34355efb3a800b42af567 SHA-1: 6a7fd881910ba3f429fdda05b4523b13724c899e SHA-256: 82432192a05e45fd7ae6ffb0184a4f107a9b1b2c23f1e1c2075ab15656654e3b
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at 'https://ttraff.ru/wix?keyword=paraganglioma+diagnosis+guidelines'. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to medical guidelines. The presence of many external PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content.

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/wix?keyword=paraganglioma+diagnosis+guidelines
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/jefipusinoxipiritip.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pujofupokutesigitugut.pdf
    • https://cdn.shopify.com/s/files/1/0434/1779/6770/files/ausformulierten_lebenslauf_mit_bewerbungsfoto_in_textform.pdf
    • https://cdn.shopify.com/s/files/1/0431/2632/5402/files/biriwusotisokif.pdf
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/nuxotelo.pdf
    • https://cdn.shopify.com/s/files/1/0439/3802/1531/files/59097348753.pdf
    • https://cdn.shopify.com/s/files/1/0433/2873/3352/files/tabamedipavosuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/9787/3831/files/lonodu.pdf
    • https://static.usrfiles.com/ugd/824332_4831cc45315f42f498cdb6c8f06baa00.pdf
    • https://static.usrfiles.com/ugd/0c8cc8_c4a9a297dd84457baaff04c166224ffa.pdf
    • https://static.usrfiles.com/ugd/3801ff_7f7ba94ea815407bb37197635972506c.pdf
    • https://static.usrfiles.com/ugd/99965f_9a154e679d2a46078df8a17fd3119f2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a4efbfdb90b458abc7854d09df9785c.pdf
    • https://static.usrfiles.com/ugd/041b56_bbcabc18f3c943e189894c1efffcdaa3.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019968.bin
d2375920498d85c19be7e5baef706cec70bca664724862e1f49f68629366a309		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19968 5144 bytes
font_01_sfnt_off0001aacf.bin
87834923300cad19e6e36ef15f353b4ade8a7b5dfc43933c1c1f980eb53e8c9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AACF 14968 bytes
font_02_sfnt_off0001da24.bin
a7b1e01542dab829d2ba5dd7846da79335ded9f65a948c274aeb683100f5fd08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DA24 16272 bytes

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