Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbf9a700fec96a93…

MALICIOUS

PDF

48.6 KB Created: 2020-10-20 23:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 994ed6b2c69549bc96e7eac7695e7390 SHA-1: 253d7f6e1729710537ebb0005f31f120cab234d6 SHA-256: fbf9a700fec96a93f705b58dd89429a1e4990d5fb2800cfeae5f5cfd50011e8c
154 Risk Score

Malware Insights

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

This PDF file contains a link farm designed to appear as search results for 'dbms lecture notes pdf free download'. The primary link, https://ggtraff.ru/123?keyword=dbms+lecture+notes+pdf+free+download, is identified as a malicious redirector. The document body and embedded link structure suggest an attempt to drive traffic to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the PDF's structure and link behavior are indicative of 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://ggtraff.ru/123?keyword=dbms+lecture+notes+pdf+free+download
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/5657735.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0480/0708/6239/files/public_school_2015_calendar_regina.pdf
    • https://cdn.shopify.com/s/files/1/0483/1949/6355/files/whirlpool_undercounter_ice_maker_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/4548/5725/files/70350963344.pdf
    • https://cdn.shopify.com/s/files/1/0436/9799/5941/files/wrestling_revolution_wwe_mod_apk_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0494/7230/7367/files/vajowenafodos.pdf
    • https://cdn.shopify.com/s/files/1/0476/8936/7718/files/16860575564.pdf
    • https://cdn.shopify.com/s/files/1/0437/0844/8920/files/zamozatagunepizifoviveli.pdf
    • https://cdn.shopify.com/s/files/1/0268/7247/9930/files/chapter_7_geometry_practice_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0484/3120/2458/files/labour_law_short_notes.pdf
    • https://uploads.strikinglycdn.com/files/a93219b2-4940-49a2-bc20-c268e4b1fd8c/xekakagovodapevisusalelo.pdf
    • https://uploads.strikinglycdn.com/files/7af3a487-cbe3-4b39-aea7-54e9a89d6866/94097477059.pdf
    • https://uploads.strikinglycdn.com/files/52f4fa24-1099-452d-9ce7-2af152f32740/maluv.pdf
    • https://cdn.shopify.com/s/files/1/0500/4079/9392/files/vintage_sekonic_light_meter_manual.pdf
    • https://cdn.shopify.com/s/files/1/0483/6950/0309/files/butefukusagom.pdf
    • https://cdn.shopify.com/s/files/1/0481/1784/2073/files/17575460789.pdf
    • https://cdn.shopify.com/s/files/1/0437/1546/1285/files/nalewovilovefevene.pdf
    • https://s3.amazonaws.com/zetare/22688922797.pdf
    • https://s3.amazonaws.com/gupuso/novogapabagemejup.pdf
    • https://s3.amazonaws.com/jamokaroxoj/30660091547.pdf
    • https://s3.amazonaws.com/jamokaroxoj/vubuf.pdf
    • https://s3.amazonaws.com/tadovu/23031151837.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_off0000706b.bin
4af45da44aa38cc13844e22bf4f7b1b9bd5b42c7e654f5ee307c7b313097bb82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x706B 5532 bytes
font_01_sfnt_off00008330.bin
7794da921bf2fd88dd0aef46b3bd7a563c952c8697eca5b131711ee5b87a022e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8330 10264 bytes
font_02_sfnt_off0000a685.bin
a015afb1285401fb06c9fb00509a79df6154bfb0a6879711bec2c26736cf13ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA685 3676 bytes

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