Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e803b08591c529…

MALICIOUS

PDF

40.5 KB Created: 2020-08-30 04:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9574041214592f734599ebb5aafa60d4 SHA-1: 69e36dce1509494814647f5b5b2844fbdacc6e80 SHA-256: 33e803b08591c529c6b67eb184608afc0d4891326d6072cb21f11104af19b96b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/wix?keyword=how+to+download+printer+queue+docume'. This indicates an attempt to lead the user to a malicious site. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to benign Shopify domains, but the primary redirector is highly suspicious. No scripts were extracted, but the presence of embedded URLs and the redirector strongly suggests a phishing or malware delivery 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/wix?keyword=how+to+download+printer+queue+docume
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0447/7698/0629/files/illinois_annual_report_forms.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/self_evaluation_answers_examples.pdf
    • https://cdn.shopify.com/s/files/1/0434/1340/5850/files/92202298441.pdf
    • https://cdn.shopify.com/s/files/1/0432/0627/9332/files/adini_sen_koy_77_english_subtitles.pdf
    • https://cdn.shopify.com/s/files/1/0428/6509/8908/files/38040239902.pdf
    • https://cdn.shopify.com/s/files/1/0429/1044/9830/files/zupatixeze.pdf
    • https://cdn.shopify.com/s/files/1/0430/3038/0698/files/15368601762.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/zagafuwekeditasan.pdf
    • https://cdn.shopify.com/s/files/1/0435/1570/7551/files/steel_sawhorse_plans.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9157/files/giwozexuxutadifebil.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/18375184357.pdf
    • https://cdn.shopify.com/s/files/1/0432/5569/3470/files/zelidoxakejebazexa.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_off0000602b.bin
8e52c5a4ccabb53ce0251d81fc94072d990dd08a3b81951716fa980f25992796
pdf-font-stream PDF embedded font (sfnt) at offset 0x602B 5220 bytes
font_01_sfnt_off000071dd.bin
c690e8685ca40356617d45924c3aaa5252a26ad549a60d6f8be7e30215eb079b
pdf-font-stream PDF embedded font (sfnt) at offset 0x71DD 10400 bytes