Malicious PDF — malware analysis report

Static analysis result for SHA-256 92fcee1ba07d89a3…

MALICIOUS

PDF

32.5 KB Created: 2020-08-01 06:21:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19ec1eb06d01f3b1ddf87633d5f0c43d SHA-1: a23f9840ee8ceea3572053797422c2c919de2270 SHA-256: 92fcee1ba07d89a3c38c73202b7de2c7a0271b0fb5646111904cd155fbdb50f5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The primary malicious link, 'https://ttraff.com/pify?keyword=glock+diagram+pdf', is designed to lure users into clicking by promising a 'Glock diagram pdf'. The document body, though heavily obfuscated, contains this lure text and numerous other URLs, many hosted on Shopify, likely to appear legitimate. The ML classifier strongly flagged this PDF as malicious.

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=glock+diagram+pdf
    • http://files.1000cancerstories.com/uploads/1/3/1/6/131636930/juzazaja_pekok_tidifadagubozo_wavot.pdf
    • http://files.nellie-vanbruggen-edu.ca/uploads/1/3/1/4/131437670/39a2f988eabf.pdf
    • http://files.515worldwide.com/uploads/1/3/2/6/132682892/3299ff1c7a11176.pdf
    • http://files.cphsvirtualmuseum.com/uploads/1/3/1/1/131163667/wudunutagojoriwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6843/2288/files/296422580.pdf
    • https://cdn.shopify.com/s/files/1/0436/4691/0624/files/vifowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7097/1299/files/nifixosesazitibesezifu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5282/5750/files/lufexufejomipufokavulug.pdf
    • https://cdn.shopify.com/s/files/1/0429/2454/0071/files/47554539811.pdf
    • https://cdn.shopify.com/s/files/1/0435/3890/7288/files/womuwe.pdf
    • https://cdn.shopify.com/s/files/1/0434/7976/1061/files/jopetu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/pevozibasaxorunuzobekef.pdf
    • https://cdn.shopify.com/s/files/1/0435/2730/7416/files/vekodigogofakixige.pdf
    • https://cdn.shopify.com/s/files/1/0431/7616/5536/files/xefodub.pdf
    • https://cdn.shopify.com/s/files/1/0429/8237/5577/files/davenenekuripogovifonifi.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004275.bin
100925a92190b5f4d24728cba9f72f9df6ff7bab1b17e744d2acffe59f116bef
pdf-font-stream PDF embedded font (sfnt) at offset 0x4275 5392 bytes
font_01_sfnt_off000054c1.bin
ae64700039613944c596cc537bf823d77c70023d4e72bc0ce03468915363f76a
pdf-font-stream PDF embedded font (sfnt) at offset 0x54C1 9652 bytes