Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7c16164947a2777…

MALICIOUS

PDF

42.2 KB Created: 2020-08-25 14:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d026af4406c92e711d48f9953fdf33ae SHA-1: 4730d7e5f67336b092dbe8b6b4278ece946509f1 SHA-256: c7c16164947a2777b6c49de3a17b1d82c67643972d9a4e77a9354548c2259f84
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=japan+guide+tourism', suggesting a lure to manipulate search engine rankings and redirect users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=japan+guide+tourism
    • http://files.theventure.blog/uploads/1/3/1/3/131382274/b293129f.pdf
    • http://files.photographybypatti.com/uploads/1/3/1/8/131856454/3ef60d2cb360c4.pdf
    • http://sevizujo.bgsewing.com/uploads/1/3/1/0/131070001/xulet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1311/9905/files/figewobunalajomubefate.pdf
    • https://cdn.shopify.com/s/files/1/0435/6639/9647/files/25511895282.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35022180152.pdf
    • https://cdn.shopify.com/s/files/1/0436/0280/4898/files/5080142543.pdf
    • https://cdn.shopify.com/s/files/1/0430/1648/7065/files/rowavilomodamaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3871/files/nigewagowejabadibaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/rexelaxumebivaxujili.pdf
    • https://cdn.shopify.com/s/files/1/0436/8941/0713/files/most_common_russian_verbs.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/78216512402.pdf
    • https://cdn.shopify.com/s/files/1/0438/5269/3654/files/80881981651.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_off00006828.bin
c46915267560b21e0d394b43801d44141510d1c48e4c359562f8930da8f091da
pdf-font-stream PDF embedded font (sfnt) at offset 0x6828 5236 bytes
font_01_sfnt_off000079d8.bin
1ce799134731b1fd06b3ec9106a65f1978c308db0f6fc3f30cee8fca8a56088d
pdf-font-stream PDF embedded font (sfnt) at offset 0x79D8 10096 bytes