Malicious PDF — malware analysis report

Static analysis result for SHA-256 60133828b03960ba…

MALICIOUS

PDF

41.4 KB Created: 2020-08-08 21:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 936365e25c721907db114ab7eee01beb SHA-1: 20766ea46eb0773c886eec37f64d68b1b8454c9c SHA-256: 60133828b03960baf950dcea5d4ad82077500d9fd05e1891cff0a0efea449ff0
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a glossary and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly flagged this PDF as malicious, supporting the presence of malicious redirector infrastructure.

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=glosario+de+epidemiologia+veterinaria+pdf
    • http://files.yououghttowriteabook.com/uploads/1/3/1/8/131856392/sapoxu.pdf
    • http://files.yenway.com/uploads/1/3/0/8/130874433/e3c4f0466c7.pdf
    • http://files.joycedonahuelive.com/uploads/1/3/2/7/132741110/7727096.pdf
    • http://files.williamsportmdcommunityband.org/uploads/1/3/1/3/131383743/6261657.pdf
    • http://files.theesteemprojects.com/uploads/1/3/1/4/131483138/f24e1882a4cb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2942/8384/files/admiral_mcraven_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/6382/8895/files/34014981190.pdf
    • https://cdn.shopify.com/s/files/1/0436/5893/6473/files/vmware_vix_api.pdf
    • https://cdn.shopify.com/s/files/1/0433/4016/9366/files/61148668306.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/83357981177.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/30071240147.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/mathematics_hl_option_statistics_and_probability.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/dubai_metro_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/5569/3470/files/zelidoxakejebazexa.pdf
    • https://cdn.shopify.com/s/files/1/0436/9232/7077/files/change_font_size_html.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/divedutixivene.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/82774833652.pdf
    • https://cdn.shopify.com/s/files/1/0440/8056/2326/files/sweet_sixteen_sample_programs.pdf
    • https://cdn.shopify.com/s/files/1/0428/2505/6412/files/malformaciones_congenitas_embriologia.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062a2.bin
0a711c005d1beb8a9515b575291b7b60d8186cd07f9f1ad92cf6363fd2adbcc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A2 5452 bytes
font_01_sfnt_off00007523.bin
fdf8a42fc18841aa35d1c6815a6e9750072446032175586672ad35aedf2a8560		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7523 10248 bytes

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