Malicious PDF — malware analysis report

Static analysis result for SHA-256 6979a9895076086f…

MALICIOUS

PDF

49.1 KB Created: 2020-08-21 14:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d59cb73d35671b44c2273e43e866dbcf SHA-1: f55f6f305081dfa58d2aab879a40a0d6fb3fc5a6 SHA-256: 6979a9895076086f5a6f0845762d6bc0214d69d29f6b1142b18d4919e163c548
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to `https://ttraff.ru/pify?keyword=gujarat+samachar+bhavnagar+avruti+pdf`. Additionally, it hosts a large number of external PDF links, many of which are benign but likely serve to obscure the malicious intent. The ML classifier strongly flagged this PDF as malicious. The presence of embedded links and the redirector suggest an attempt to lead the user to a malicious site, potentially for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=gujarat+samachar+bhavnagar+avruti+pdf
    • http://files.singlewomanjoan.com/uploads/1/3/1/4/131406498/7119854.pdf
    • http://files.moiliilicc.org/uploads/1/3/2/6/132681887/240c327.pdf
    • http://genof.crossfitharborsprings.com/uploads/1/3/1/8/131856907/9392934.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/1969/7303/files/american_hunter_feeder_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/4247/9007/files/34062025509.pdf
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/goropinilagopifa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/confluence_page_properties_report_last_modified.pdf
    • https://cdn.shopify.com/s/files/1/0433/5576/6942/files/patemawumibomodomolid.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/6520141465.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1641/files/41540307017.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/44166837413.pdf
    • https://cdn.shopify.com/s/files/1/0436/4759/8742/files/gatufalajek.pdf
    • https://cdn.shopify.com/s/files/1/0435/5755/2277/files/dagobit.pdf
    • https://cdn.shopify.com/s/files/1/0435/7586/9603/files/mebefanijoluf.pdf
    • https://cdn.shopify.com/s/files/1/0435/9494/0573/files/joomla_e-_commerce_template_free.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_off000067a9.bin
59aa3d5a7bbeb00a5a9f263e33f765575f843e1e7bd9ff1a16ee25572a1f22be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A9 5500 bytes
font_01_sfnt_off00007a41.bin
46f58b7570cbcef132bc4221d109be02fa48c340f4487fd48e1130b9bfa2b633		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A41 15320 bytes
font_02_sfnt_off0000a96b.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA96B 4324 bytes

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