Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e3ff81c5fccaae…

MALICIOUS

PDF

60.1 KB Created: 2020-07-31 13:13:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9960ac9a8fc918f8c3a886ace8180e0c SHA-1: 79a3fa22c77118a3f69307e92120d6dbcf5f6134 SHA-256: 75e3ff81c5fccaae5c8353e86925d80e2685c470768e3debb88da0419a4123fd
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a redirector service. The primary link directs to 'ttraff.ru', which is flagged as malicious. This suggests the document is designed to lead users to malicious websites, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly indicate a phishing 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.ru/pify?keyword=ecology+and+environment+pd+sharma+pdf
    • http://files.mtviewbaptistchurchal.org/uploads/1/3/2/7/132740965/poxefamubel-dopirowoj.pdf
    • http://files.jenniferdanahart.ca/uploads/1/3/2/7/132740285/potomapafupa.pdf
    • http://files.fitnessdetermination.com/uploads/1/3/0/7/130739621/a8d1f5de79414.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jonexosorovofevovu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0201/1548/files/31584570325.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/pezajumukupu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/fezimevidigopufogubasalig.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/42150348495.pdf
    • https://cdn.shopify.com/s/files/1/0437/1188/9562/files/44920664416.pdf
    • https://cdn.shopify.com/s/files/1/0438/4089/7174/files/powisutumogixazebere.pdf
    • https://cdn.shopify.com/s/files/1/0432/4392/9762/files/59009971934.pdf
    • https://cdn.shopify.com/s/files/1/0432/2384/2978/files/78198098288.pdf
    • https://cdn.shopify.com/s/files/1/0431/1502/0448/files/76552025935.pdf
    • https://cdn.shopify.com/s/files/1/0430/8185/9225/files/7576927167.pdf
    • https://cdn.shopify.com/s/files/1/0432/5949/4555/files/nevebeximexozene.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000722a.bin
f6ea1976b14c41c65dfb19aea9c894e0eb2b9437d7933429fe881e351d40fe5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x722A 18584 bytes
font_01_sfnt_off0000accc.bin
db1e3064dce23744d7a114bf432a1547686a3f50653ce7dfd9219014684130b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACCC 5476 bytes
font_02_sfnt_off0000bf48.bin
97d75506eb826e545d02cbeb85c21a12fd339dff044adaf51df94da8ee3cf5e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF48 10772 bytes

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