Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e0a0d577833b4b…

MALICIOUS

PDF

51.7 KB Created: 2020-07-28 16:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0dd84e9ebbe5c7ce91f75f4e8c0383f0 SHA-1: 687ba5d911e87e53fb013b03c495c508cb29d69b SHA-256: 33e0a0d577833b4b7552f2b2b75ae8ca867167ef88bbe6f06b5d291d18adff80
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of a malicious redirector link suggests an attempt to lead the user to a compromised or malicious site, likely for further exploitation or phishing.

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.ru/pify?keyword=administrative+law+canada+pdf
    • http://files.nurturingnaturallyllc.com/uploads/1/3/1/8/131859895/ab5ec624.pdf
    • http://files.littlemoonyogaperth.com.au/uploads/1/3/0/7/130739982/pataxiwiru.pdf
    • http://files.musictheoryhelper.com/uploads/1/3/1/4/131408170/fevogasupemamij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/3004092939.pdf
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/goliluvenuto.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1920/files/58167107501.pdf
    • https://cdn.shopify.com/s/files/1/0440/4215/8245/files/86926066479.pdf
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/kixavetelesub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0042/1790/files/wodarekevijuzejixev.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/24656483367.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8064/files/zevaxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/21237279538.pdf
    • https://cdn.shopify.com/s/files/1/0429/6366/5062/files/linutuluxuxeranub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zukax.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_off00008e38.bin
54e2f89996a6a341ec0696794aca2a6302972e1e748c822972a222049203ea0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E38 5120 bytes
font_01_sfnt_off00009f94.bin
f202f06f5ee80d8d3b5164eb2462870e7ca365cfac012439d5e1c849c7d822e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F94 10040 bytes