Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef182fe91701136…

MALICIOUS

PDF

44.5 KB Created: 2020-08-20 20:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dce6f17da7492b287189a139e62fe2a9 SHA-1: 3342c59a10db759ec872dd4b259e81d2bdee1e16 SHA-256: 0ef182fe917011360809b114389a6e38dde880a3218cf01b106caaa0c6db6061
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=case+hardening+steels+pdf', which is flagged as malicious. This suggests the document is designed to trick users into clicking the link, likely leading to a phishing or malware download site.

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=case+hardening+steels+pdf
    • http://files.vallancelab.com/uploads/1/3/1/3/131380504/5890879.pdf
    • http://files.moversinmiami.net/uploads/1/3/1/4/131484133/tadovef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3446/0828/files/taxewezegodisefal.pdf
    • https://cdn.shopify.com/s/files/1/0428/4216/1319/files/gegedadimijapavopik.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/95214867568.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/pekekeweravax.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/budget_speech_2020_19_bangladesh.pdf
    • https://cdn.shopify.com/s/files/1/0433/2178/6521/files/kebeduzififexa.pdf
    • https://cdn.shopify.com/s/files/1/0445/8338/7295/files/mawelome.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3678/files/list_of_adjectives_and_their_opposites.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/reragijod.pdf
    • https://cdn.shopify.com/s/files/1/0432/9776/7592/files/muwewa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/matam.pdf
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/prima_strategy_guides.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6234/files/mewezuwimel.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_off000070d6.bin
e7d5dbafdd3bae783401aba24a12d2c9793d2c0ee420e5b3f37d786757fd54dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x70D6 5208 bytes
font_01_sfnt_off00008285.bin
eb8118a86a5ff4545c95c442509d5f4477d93bfe169eea91568ce1c18c8c662b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8285 10108 bytes