Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d1846005deb5e8…

MALICIOUS

PDF

42.6 KB Created: 2020-08-14 19:40:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea1041c47e94cfb7517c58851bb946eb SHA-1: 91a941d2134f874aeae5620fd565b2b792bd43f8 SHA-256: 69d1846005deb5e8a3053af04f27e136041aca8a282eaa9fab638ed1fd777eeb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to malicious infrastructure, disguised as a search result for 'wavefront guided lasik near me'. It also hosts a large number of external PDF links, many of which are benign Shopify links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness.

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=wavefront+guided+lasik+near+me
    • http://files.christyokeeffe.com/uploads/1/3/1/0/131071145/tagutuxarodoke-wasufalalibelir-masisebopom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0769/7305/files/lurosupovefilixu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekosipavejidowusa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9027/1638/files/95608279850.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/82082542404.pdf
    • https://cdn.shopify.com/s/files/1/0435/5181/7879/files/digimon_series_list.pdf
    • https://cdn.shopify.com/s/files/1/0434/6707/9830/files/5603354556.pdf
    • https://cdn.shopify.com/s/files/1/0432/1610/9736/files/xabovalejawaxatuwemep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64831632673.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_off000067dd.bin
ad59ec3ad308189dc2ddbda621098517973dbc812da054bab9fa64fba891d387		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67DD 5364 bytes
font_01_sfnt_off00007a21.bin
2582e732b336cfde77b95835b374dc3281023e9f20f3cd1db04d1102eaee931d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A21 10588 bytes

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