Malicious PDF — malware analysis report

Static analysis result for SHA-256 176b42c02029fe0c…

MALICIOUS

PDF

32.2 KB Created: 2020-09-02 12:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f57d708b677d037ca518727d150592f SHA-1: 4837599cd9e337694d48b0783caa446ae78c6e36 SHA-256: 176b42c02029fe0c8ab881c524fae9a9c0b64538908b28f6e8ea9fa55eca00bd
154 Risk Score

Malware Insights

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

This PDF file contains numerous links, including one to a known malicious redirector infrastructure at 'https://ttraff.cc/wix?keyword=catalogo+cores+suvinil+pdf'. The document body, though heavily obfuscated, appears to contain references to the same URL and other benign-looking PDF links, suggesting a link farm or redirection tactic. The ML classifier also flagged this PDF with high confidence, indicating 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.cc/wix?keyword=catalogo+cores+suvinil+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b50c55_3ff227141e8e4c9ea81be42eb6f8974c.pdf
    • https://static.usrfiles.com/ugd/ae15ca_3f3b5307c2384eddaee968204e5c4f24.pdf
    • https://static.usrfiles.com/ugd/3e5d97_208d5ba18e0343e79d4f5b1400e5d1a2.pdf
    • https://cdn.shopify.com/s/files/1/0429/7903/3241/files/42429672411.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0274/files/shampoo_de_cetoconazol_bula.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11383010616.pdf
    • https://cdn.shopify.com/s/files/1/0429/7529/7689/files/gotuwotigojazowesatenuzu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3537/7307/files/angry_birds_2_android_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/7199/5033/files/alchimiste_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0428/3564/0487/files/abbottabad_commission_report_pdf_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/4930/2693/files/sawus.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/davv_cet_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/xifip.pdf
    • https://sacsuvinil.azurewebsites.net/images/Indicacaodecores.PNG
    • 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_off00004295.bin
27fccf8009a76d5d4bd319e9ae326f7fb6e33030f6bf86e736e64c387cdf2a4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x4295 5288 bytes
font_01_sfnt_off000054a7.bin
3d970bd6ec2c68766adce01efea4ddcaf0619aa3865dc5c3934cbe2d8168a72c
pdf-font-stream PDF embedded font (sfnt) at offset 0x54A7 9340 bytes