Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d37e14bac8be6e…

MALICIOUS

PDF

40.3 KB Created: 2020-08-01 23:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f741dfc0af3253395dce7fd4c3dbfee7 SHA-1: 6dc261e608cc3e2906e08267532f7a280dd83f4f SHA-256: d1d37e14bac8be6ea4528c0b578bacb8232268d3507cd139dcfa0c65ae370c63
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, with a primary link to `ttraff.com` identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to uninstalling software, suggesting a social engineering lure. The presence of a large number of external PDF links, many hosted on `cdn.shopify.com`, indicates a link farm designed to distribute malicious content.

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=how+to+uninstall+citrix+receiver+mac
    • http://files.bensreeder.com/uploads/1/3/0/7/130776246/belatuw.pdf
    • http://files.m28global.org/uploads/1/3/2/6/132682882/puvujaju-kogubedeberumej-wosesudige.pdf
    • http://files.melissaphotographydesign.com/uploads/1/3/2/3/132303378/xupumalakibo-wezuvifaweg-rubepemu-tinatim.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/jediwevusow.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/zolek.pdf
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/94118002456.pdf
    • https://cdn.shopify.com/s/files/1/0438/4528/8093/files/80703386812.pdf
    • https://cdn.shopify.com/s/files/1/0439/2475/0504/files/34501188777.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/jenirapapololawifoda.pdf
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/92400757565.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vakijuxek.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/nuvumebenina.pdf
    • https://cdn.shopify.com/s/files/1/0429/1490/6275/files/rovowigujiwusegegot.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000615b.bin
24574718451967e439d40222f4f94b1f713d24c579fb805bbdb8298cd0b5ffde
pdf-font-stream PDF embedded font (sfnt) at offset 0x615B 5124 bytes
font_01_sfnt_off000072c8.bin
df572a1a1e021ac1051ff62ee32c38b8377535c70c3e6b511dd0d49ecdfe16c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x72C8 9912 bytes