Malicious PDF — malware analysis report

Static analysis result for SHA-256 853b944fff20aeb6…

MALICIOUS

PDF

53.3 KB Created: 2020-08-24 05:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3a2cf213d370f17bf86d1909fd83eed2 SHA-1: 2a965705983107676cc6ecdbe77bce4e9b9f9654 SHA-256: 853b944fff20aeb64cc5f65f24d42aa8e2a18032574c4874287773b8f57b8543
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL for the malicious redirector and appears to be a lure for song downloads. The ML classifier strongly indicated maliciousness, supporting the presence of malicious 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.ru/pify?keyword=badlapur+songs+free++naa+songs In PDF document text
    • http://rubewu.lifeatcfa.org/uploads/1/3/1/4/131453133/risuvonaveme-wefasef-bidufivaw.pdfIn PDF document text
    • http://files.livingjustforhisglory.com/uploads/1/3/1/4/131407388/570420.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7753/2824/files/data_warehouse_tutorial_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2803/8310/files/kixujiratozitiluf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0067/5995/files/jikudesowisuravozofufiruz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6876/5848/files/3105649509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/wudegovija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5207/2088/files/63864294923.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1584/5541/files/critical_theory_introduction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/20791736020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/fomawolakerakamumiwiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5574/2114/files/vuvanuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0741/6219/files/proyecto_de_grado_umsa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9583/4280/files/magumeke.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000084ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84AE 5260 bytes
SHA-256: 757cd8698360db2e1059850f96b3ded0e25d7a324f749804ed1bb4d90b33d080
font_01_sfnt_off00009698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9698 15468 bytes
SHA-256: b1925db8b94e1277046891f1e8594f6cbbf74e2920bd22ec6ad7950b60021a57

Open this report in the interactive analyzer, or submit your own file for analysis.