Malicious PDF — malware analysis report

Static analysis result for SHA-256 6518f412f81c7681…

MALICIOUS

PDF

43.5 KB Created: 2020-08-06 11:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fc05b502cc490c905f55f970770ba3b SHA-1: 8632c153e85df1b7e8a7a3e01d215f9ff0178892 SHA-256: 6518f412f81c7681e3d5bb72e2947dcd32a22083286e965adca22c58d38d89c2
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The primary malicious URL, 'https://ttraff.cc/pify?keyword=greenhouse+gases+pdf', is a known redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the intended destination. The presence of many links to external PDFs, some hosted on potentially compromised or low-reputation domains, further supports a link farm or phishing attempt.

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/pify?keyword=greenhouse+gases+pdf
    • http://files.omoroseblessings.com/uploads/1/3/1/8/131856446/zerifiperavoniz-firipaj.pdf
    • http://files.suzannejensenbleustudio.com/uploads/1/3/1/8/131856247/9edc0e2f99775fd.pdf
    • http://daripu.acofla.com/uploads/1/3/1/4/131437987/rawip-tipasovovize-nerifinud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7424/1183/files/93385407029.pdf
    • https://cdn.shopify.com/s/files/1/0439/1639/4648/files/58783491445.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6138/files/58531839598.pdf
    • https://cdn.shopify.com/s/files/1/0431/3566/4284/files/automobile_engineering_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/1826/3464/files/lelevudasiwabur.pdf
    • https://cdn.shopify.com/s/files/1/0435/0266/5892/files/bawelowalubunufixabolal.pdf
    • https://cdn.shopify.com/s/files/1/0432/7571/4715/files/zazusatavonaxuket.pdf
    • https://cdn.shopify.com/s/files/1/0439/7786/7422/files/37631552450.pdf
    • https://cdn.shopify.com/s/files/1/0434/8837/9032/files/11747548976.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/1555779332.pdf
    • https://cdn.shopify.com/s/files/1/0433/9020/6119/files/54512074243.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_off00006d40.bin
2f42379f27f8abe4a8866da85b6363c0be12f05a75c1dc3c2401b5cc6e88b0eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D40 5304 bytes
font_01_sfnt_off00007f48.bin
063e5be878992f41b26f5d70a187022a8acb5a3118d57b7c1960270e328019c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F48 10128 bytes