Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d1d1eee3a8a7c3…

MALICIOUS

PDF

40.7 KB Created: 2020-08-31 07:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b4c47944204c03f5b20d96dc1cee7e1 SHA-1: 172f1a5f4bedd2a8cc0399bbb1f8c599acd33b9c SHA-256: 08d1d1eee3a8a7c374600d6f66724e2dfe04cbfc3fbb57a7042da99d4ba0fa3a
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to funnel victims to further malicious content. The document body and embedded links suggest a lure for free downloads, which is a common tactic for phishing and malware distribution. The presence of numerous PDF links, many pointing to Shopify domains, indicates a link farm designed to improve search engine ranking for malicious content.

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/wix?keyword=welcome+wav+sound+free+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/zunidoselolatiwinadeju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdf
    • https://cdn.shopify.com/s/files/1/0440/6873/3078/files/vobewebapusomora.pdf
    • https://cdn.shopify.com/s/files/1/0437/6123/8168/files/45524119975.pdf
    • https://cdn.shopify.com/s/files/1/0440/7967/7590/files/uscis_forms_by_mail.pdf
    • https://static.usrfiles.com/ugd/1a89c8_a3a487aa066046e39d6c09a5937e4450.pdf
    • https://static.usrfiles.com/ugd/96bf9d_863cee4a8da044ba9adc48445719d98f.pdf
    • https://static.usrfiles.com/ugd/b9801a_6b49afbee6f74bb49fcb6978fff8f1b2.pdf
    • https://static.usrfiles.com/ugd/b88e3d_49883c545436462ab74d4b9d80db87fa.pdf
    • https://static.usrfiles.com/ugd/c63dba_d75afca6726340afab45f416138eaac5.pdf
    • https://static.usrfiles.com/ugd/b8c837_8efc84ac797149e7b103bb65430a3f90.pdf
    • https://static.usrfiles.com/ugd/b8c837_f51b578cdb8a458c946aa13a31110476.pdf
    • https://static.usrfiles.com/ugd/a771bd_6679f03e30a94a3c8a063e41ccdfa141.pdf
    • https://static.usrfiles.com/ugd/724bd4_57d2282c8df14b96b259799b90aca1da.pdf
    • https://static.usrfiles.com/ugd/c63dba_d66e5e9b23434be2afbe290440f16496.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_off000060ce.bin
fc6857f1dec4d835e9ad8364af76fd252c93322dbc9438bec143e71840e88fd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x60CE 5332 bytes
font_01_sfnt_off000072ef.bin
5e864cfec7f73ee68b877b6429f81880f7cf12cc41e964af3910476b50971a13
pdf-font-stream PDF embedded font (sfnt) at offset 0x72EF 10400 bytes