Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bbc8d47c8ba40c7…

MALICIOUS

PDF

45.7 KB Created: 2020-08-21 03:29:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 995e483d33b0ebaf18aa58aa0225f65a SHA-1: bdb2e5b73a30c8833cb56fa4a0f6377f92c74397 SHA-256: 6bbc8d47c8ba40c7345aaec9f59f76f90e1a9f3a341c9b6a147635e316a1a9ac
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, https://ttraff.com/pify?keyword=switzerland+visa+form+pdf, is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains text related to visa forms, suggesting a phishing or scam lure. No scripts were extracted, but the presence of many external links points to a link farm or redirection attack.

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=switzerland+visa+form+pdf
    • http://files.myroyalorganics.com/uploads/1/3/0/8/130814423/6335139.pdf
    • http://notewum.shopfoxandfeather.net/uploads/1/3/0/9/130969592/jatexulajodi.pdf
    • http://napas.flyajetsim.com/uploads/1/3/0/9/130969690/sagivi.pdf
    • http://bexubefu.pharma-c.com/uploads/1/3/1/6/131637136/duzixemasa-pobagepuj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0443/0348/3036/files/lolarebujadevimor.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3576/files/igcse_business_studies_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0432/7217/5781/files/bhagavad_gita_in_bengali_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/partitura_caballo_viejo_para_piano.pdf
    • https://cdn.shopify.com/s/files/1/0430/6177/2442/files/41551819780.pdf
    • https://cdn.shopify.com/s/files/1/0450/3034/2806/files/varicocele_testicular_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0440/0221/4046/files/95489655182.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2104/files/49844780428.pdf
    • https://cdn.shopify.com/s/files/1/0438/4574/6848/files/8126924260.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/gakurewukifuru.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_off00007253.bin
0c12ace0efe1d388b423db0382489c97020c9bc395febca3b916b2b23a56ce79
pdf-font-stream PDF embedded font (sfnt) at offset 0x7253 5492 bytes
font_01_sfnt_off00008502.bin
48a8d25c0b597a964e621f96dfaa9396f3fab1f037ce26e3b8668e99558537f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8502 10748 bytes