Malicious PDF — malware analysis report

Static analysis result for SHA-256 3422eaf7c2b91251…

MALICIOUS

PDF

47.0 KB Created: 2020-08-06 03:36:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4db8ce725049ebc03a5438726311790b SHA-1: db4cf316184a48fcd70ac8900d4f5f5827701407 SHA-256: 3422eaf7c2b912517a13192a9710d4f7b7915b08e2f2189108bafd544f041642
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 `ttraff.ru`. The document body, though heavily obfuscated, appears to be a lure related to an 'acid reflux diet plan PDF'. The presence of many external PDF links suggests a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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=acid+reflux+diet+plan+pdf
    • http://files.510radio.com/uploads/1/3/2/6/132695278/fc5e21bcd.pdf
    • http://files.inthemomentrestorations.com/uploads/1/3/1/3/131398117/3f1193211ca3.pdf
    • http://files.modebylauren.com/uploads/1/3/1/4/131452804/silal_mupuxokexaxo_xugafazufagek.pdf
    • http://neped.3bugfarm.com/uploads/1/3/0/7/130776046/jufofokamixitujesuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/9441/6290/files/50702482278.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/cefr_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/39968871265.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1110/files/rangitaranga_in_usa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1186/5751/files/windows_xp_telephone_activation_keygen.pdf
    • https://cdn.shopify.com/s/files/1/0438/2123/6386/files/zesijitiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/9275/4076/files/19463830543.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/4196765733.pdf
    • https://cdn.shopify.com/s/files/1/0428/6296/8991/files/38849330343.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/56315608427.pdf
    • https://cdn.shopify.com/s/files/1/0429/1896/9507/files/pulefisimarum.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fb2.bin
492437e6508249824ead823db3dea5d854c29c8840f61e4ea3a22a9ecbb09067		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB2 4800 bytes
font_01_sfnt_off00008003.bin
5f30552602356200c660c199449acb84ac34f2e4f5155709ece17fe075373b29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8003 9740 bytes
font_02_sfnt_off0000a154.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA154 4324 bytes

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