Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f8c89dea6d4ef59…

MALICIOUS

PDF

45.1 KB Created: 2020-09-01 22:39:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c06ee5b8e00bf46a8d462001ee12e36 SHA-1: 32ccfc7a3476baa9a92c24aafaf2b2237bff87bd SHA-256: 5f8c89dea6d4ef5902df9ea52e339327a35ab62b647177b4718afedd3dbfd0f1
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=amazing+grace+pdf+free' which is flagged as malicious. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic, likely intended to drive traffic to malicious sites. No scripts were extracted, but the embedded links are sufficient to indicate a malicious intent.

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.club/wix?keyword=amazing+grace+pdf+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/4771/2928/files/xixikumusunamixeselatuwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5153/9861/files/mamuzadawaredobubev.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3464/files/bradley_smoker_manual.pdf
    • https://cdn.shopify.com/s/files/1/0465/4117/6990/files/tirunaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/vizaforijiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84860081798.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/perap.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/gegerixemixesavavuxuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6910/files/21426846558.pdf
    • https://static.usrfiles.com/ugd/b8c837_89ca5d07582545b3a6e3f7cf3843dbbc.pdf
    • https://static.usrfiles.com/ugd/b6edda_7d7351f12b464fe0906d548fce5fffdb.pdf
    • https://static.usrfiles.com/ugd/ba3095_3e3ce5785bb741c7b8b078dbc3e5503c.pdf
    • https://static.usrfiles.com/ugd/89363e_a824e441028641ff9c0080485c3323c1.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_off00006543.bin
3dcc7bc19b88b45c816e878dc0f86b418f3d5d686a13e9be92e8013856942bed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6543 4900 bytes
font_01_sfnt_off000075c3.bin
7650b19c291c7d48d2b89b6f26f2ae6ea7e836a493cb9014ee42c58d71cd1ce1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C3 10516 bytes
font_02_sfnt_off000099cf.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99CF 4324 bytes

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