Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbbe1aa16345723c…

MALICIOUS

PDF

41.0 KB Created: 2020-09-03 04:41:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 301e5a6c25d556535a94be94b385530c SHA-1: bcaf00e74994c581a02ffa72ba6ef1e63b546114 SHA-256: dbbe1aa16345723c05aa0138a8827e71ec4065f41d154302e40fd99c987ecd47
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.me'. It also exhibits characteristics of a PDF link farm, embedding a large number of external links, many of which point to Shopify domains. The document body, though heavily obfuscated, contains the URL that triggered the redirector heuristic, suggesting an attempt to drive traffic to malicious content or for SEO manipulation.

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.me/pify?keyword=les+tubes+d%2527+analyses+biologiques+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/aneuploidia_y_euploidia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4681/3346/files/registro_anecdotico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8116/9051/files/97985290432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6621/9941/files/mipabomumenesodakesulejip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6126/4035/files/talimomakudi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6553/0785/files/goodreader_password_protected.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4164/3941/files/18378125173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9107/4976/files/pediatric_nutrition_assessment_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1274/1529/files/kirovizir.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/07ef24_514e81097a5142208b856a68162dc948.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/345929_c6bf18b3dc8240e7a39a587f0e818222.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3eed2b_01f5c22075374e9c8e39d51b3fce1514.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/eaf48f_e8c7eb7c5e834a81ab8538d4288156c4.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000520b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x520B 5340 bytes
SHA-256: 3a64580adacf09e25d0094f68a73cba379c2ef0e78dedae1fda253f47f34e2e6
font_01_sfnt_off00006447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6447 11144 bytes
SHA-256: 84d9bb2f35e75fe6c78779ebfb698fb4b1320759f2897c7fb04a9e2077a4d41f
font_02_sfnt_off0000876d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x876D 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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