Malicious PDF — malware analysis report

Static analysis result for SHA-256 0934ffb713c907b4…

MALICIOUS

PDF

32.8 KB Created: 2020-09-03 12:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d5cf57a435a20fd47fc6b8e2f82c13f SHA-1: a87bdc984dd6998dc246bdc9711de586329da64d SHA-256: 0934ffb713c907b4d0666e1fb0e879c5ef9ee0cf1a0249bfbdb919a4ff4e47aa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, with one pointing to a known malicious redirector. The document body, though partially corrupted, includes the same URL and a plausible lure text. The presence of numerous other links to benign Shopify PDFs suggests a link farm tactic to obscure the malicious URL. The ML classifier also strongly indicated maliciousness.

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.link/pify?keyword=project+acceptance+report+sample
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0396/0731/files/what_is_ethnography_in_qualitative_research.pdf
    • https://cdn.shopify.com/s/files/1/0451/1121/4245/files/asme_y14._5_dimensioning_and_tolerancing.pdf
    • https://cdn.shopify.com/s/files/1/0429/5426/0643/files/gazopuzexurikew.pdf
    • https://cdn.shopify.com/s/files/1/0436/3635/9326/files/10758599533.pdf
    • https://cdn.shopify.com/s/files/1/0431/2858/6402/files/binuzudorumajefage.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/educational_technology_2_lesson_12_discussion_answers.pdf
    • https://cdn.shopify.com/s/files/1/0466/9122/1668/files/bookkeeping_spreadsheet_template_excel.pdf
    • https://cdn.shopify.com/s/files/1/0431/3645/0717/files/rhinitis_medikamentosa_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0434/2133/5702/files/rubudurunarozutomegusewu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4077026649.pdf
    • https://cdn.shopify.com/s/files/1/0428/9773/5843/files/xenifok.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_off000045b5.bin
47220078c3b280e7113f6dc213dba0b0f99df92fabe70a6cb7aac34ff06551ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x45B5 5156 bytes
font_01_sfnt_off00005729.bin
f6a94d70bb325eae39a539e76fc6a8f1a888cc0fad5ac1533b225465dea40902
pdf-font-stream PDF embedded font (sfnt) at offset 0x5729 9344 bytes