Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e2474df4696134…

MALICIOUS

PDF

41.6 KB Created: 2020-08-14 09:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b10ac34a691b4f31d4592f226876a234 SHA-1: 2eb35bb4baf9b6d8c9e34241fc9740f52c038b5f SHA-256: 14e2474df46961345a8b082adb5fa57d9e700f05f888be3b7460d7025b47dc73
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a critical redirector URL (https://ttraff.ru/wb?keyword=signore%20ascolta%20puccini%20pdf) identified as malicious. The document body, though heavily obfuscated, contains references to this URL and other benign-looking Shopify links, suggesting a link farm or redirection tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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/wb?keyword=signore%20ascolta%20puccini%20pdf
    • http://files.marinegeosciences.com/uploads/1/3/1/3/131379622/1185489.pdf
    • http://files.acjewelrycreations.com/uploads/1/3/2/6/132682204/7984864.pdf
    • http://kujaven.bayareabisexualnetwork.org/uploads/1/3/0/7/130776208/6c8fefa249c0c3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/tamuwiritataxaxupu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/16910965031.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9097/files/39902412935.pdf
    • https://cdn.shopify.com/s/files/1/0437/6251/6122/files/79339713061.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/allen_jee_main_test_series_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7912/files/vepizukixivevado.pdf
    • https://cdn.shopify.com/s/files/1/0438/1881/1552/files/pagupa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0318/3258/files/77577162734.pdf
    • https://cdn.shopify.com/s/files/1/0437/1621/4936/files/71365185703.pdf
    • https://cdn.shopify.com/s/files/1/0440/5824/7320/files/39701949144.pdf
    • https://cdn.shopify.com/s/files/1/0435/7275/6648/files/motion_picture_motion_pi.pdf
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/neruzufa.pdf
    • https://cdn.shopify.com/s/files/1/0436/3013/3406/files/24962208616.pdf
    • https://cdn.shopify.com/s/files/1/0435/7105/2707/files/tomikikiner.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053d1.bin
c91a4127b59354d556ae54322842173917996d10b9ddf01c4c518f94cbb6838a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53D1 5424 bytes
font_01_sfnt_off0000663e.bin
29a0936ec052c715e06d8d2ffb46aa47dd1a18fbb700168338c1638db89b05a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x663E 6068 bytes
font_02_sfnt_off000075ee.bin
48929cc47ef9725ece55d486fbd9c4de5ecd92f88f64973d39122d108e321adc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75EE 10672 bytes

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