Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e895dc57b655cb…

MALICIOUS

PDF

50.2 KB Created: 2020-08-03 23:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9844dcb3fc3c2f8ab464d2c72c0a54e8 SHA-1: ced98595fdadf15b55b94453e64a563c1fdee101 SHA-256: 02e895dc57b655cbbe00fffe5f2450e748e53e05e5d5303e75d2bf8c6abaf661
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=treatment+of+brucellosis+pdf', suggesting a lure to a site that likely hosts further malicious content or phishing pages. The presence of a link farm heuristic further supports the malicious intent of directing users to external sites.

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.com/pify?keyword=treatment+of+brucellosis+pdf
    • http://files.cottlewolly.com.au/uploads/1/3/0/8/130813906/8681290.pdf
    • http://files.nzpics.com/uploads/1/3/2/6/132682471/7405284.pdf
    • http://files.danielmarkos.com/uploads/1/3/1/8/131871416/relafud_pojukukuja.pdf
    • http://files.uclhsoc.co.uk/uploads/1/3/1/3/131380356/98045a3b24.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/0938/4343/files/rabediloxibiguju.pdf
    • https://cdn.shopify.com/s/files/1/0430/9617/8845/files/zazinagevukujo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5281/7832/files/togijotewidutok.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/wemujexapug.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/rimotowa.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/18563911004.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/gufonokubexunupu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/aaron_smith_dancin_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zenafepejeviwasi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1138/files/befevosodop.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/visazaludimemuva.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065d7.bin
63a64f6c5ee46baf61d64d834d303d93c016330e25b52587fbfeac58b1f61bc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D7 4772 bytes
font_01_sfnt_off00007689.bin
74df4c41747bda0a5dcaac6fd0ac61af54975084f8b30fb609846061d54f7882		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7689 5272 bytes
font_02_sfnt_off00008851.bin
f80ccfa4ce0b4516abd71b880b8b076879aadd46eccef9abed9545380462a5db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8851 10824 bytes
font_03_sfnt_off0000ad14.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD14 4324 bytes

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