Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a682ddae8804f5…

MALICIOUS

PDF

42.3 KB Created: 2020-09-01 03:40:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9a02e34149d370007a404ed5fd5359e SHA-1: bebc70662a2f71779d4c2bb347dd31a8a710a1bc SHA-256: 14a682ddae8804f509b84509433cad3e8507f60b25705adb78d7cb0a8c7a5449
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting an SEO poisoning or link farm attack. One prominent link, 'https://ttraff.link/wix?keyword=bhojpuri+video+song++hdyaar', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, indicating its likely purpose is to redirect the user to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=bhojpuri+video+song++hdyaar
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/tugagaroranugewarunapiso.pdf
    • https://cdn.shopify.com/s/files/1/0435/1537/9866/files/nalakowafokebunokakimib.pdf
    • https://cdn.shopify.com/s/files/1/0433/7070/9142/files/wood_beam_gungeon.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_3d281dc528ac4153bb8b3dc7cd40b931.pdf
    • https://static.usrfiles.com/ugd/0511f5_8f3873098122473b85437b6c224f247a.pdf
    • https://static.usrfiles.com/ugd/e745be_7d839695adbc4bb68edb441b2e54a9b8.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/darenebava.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9588/files/dog_pecker_mushrooms.pdf
    • https://static.usrfiles.com/ugd/5899d5_aa23f9b8fd37444d81da8bc8d9272ee5.pdf
    • https://static.usrfiles.com/ugd/b8c837_1efd6712ad2f4dc89fe8337ef8203db9.pdf
    • https://static.usrfiles.com/ugd/b8c837_5cb0cda1480f47419fa40babc8d9a77b.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_off00005921.bin
8d0b7e7c9418f465f2d7282f048e336ec40610bf552a6c4896148a59b87c3067
pdf-font-stream PDF embedded font (sfnt) at offset 0x5921 5280 bytes
font_01_sfnt_off00006b15.bin
a46c4342f9704b692e9973dd8a09eae04497fdc9fc162f8418a27efb8e6de507
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B15 10440 bytes
font_02_sfnt_off00008ea4.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA4 4324 bytes