Malicious PDF — malware analysis report

Static analysis result for SHA-256 5412589e3b9fb839…

MALICIOUS

PDF

45.1 KB Created: 2020-09-02 05:39:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1e7c72d9bfe672bd937cf59c9543894 SHA-1: e63a975f77f1cdb635cc91de401cc93e95bd3603 SHA-256: 5412589e3b9fb8396f11c94fe4fc06748db01c51f500accfebe1c35555c32731
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1200 Hardware Add-Ins

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=crossing+over+and+chiasma+formation'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The ML classifier strongly supports the malicious verdict. The primary attack pattern involves luring users to malicious sites via deceptive links within the document.

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=crossing+over+and+chiasma+formation
    • https://cdn.shopify.com/s/files/1/0435/6807/0815/files/briton_door_closer.pdf
    • https://cdn.shopify.com/s/files/1/0434/5734/7746/files/mufozofujusob.pdf
    • https://cdn.shopify.com/s/files/1/0465/5477/5702/files/juwuxevatemu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0761/4882/files/64046132798.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/feedback_amplifiers_design_oriented_analysis.pdf
    • https://static.usrfiles.com/ugd/2274a7_f6d41c8884b64ec3ae9fae9d002ac4aa.pdf
    • https://static.usrfiles.com/ugd/c5d40f_c26b2bc298fd449b80451da89073e7f2.pdf
    • https://cdn.shopify.com/s/files/1/0436/9793/0393/files/burnin_up_jonas_brothers.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/simmons_cribs_parts.pdf
    • https://cdn.shopify.com/s/files/1/0430/1550/4029/files/51011476771.pdf
    • https://cdn.shopify.com/s/files/1/0437/2732/3301/files/dupudalujed.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/77330988365.pdf
    • https://static.usrfiles.com/ugd/63022f_d91aaf4a8afc46e6a96097b87074095b.pdf
    • https://static.usrfiles.com/ugd/a467d2_34fe6f36572344cebddf16a7c1b6910e.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab181c78135d41809a4d3d37dd25602a.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7a5154abc534d9fb684c0cba3385b6e.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_off00007311.bin
58eca3c719808d0befcff7d8b3adf57950cd4975100c5d425719c7cbb41925db
pdf-font-stream PDF embedded font (sfnt) at offset 0x7311 5368 bytes
font_01_sfnt_off0000852e.bin
c189eac44a54704a49a95a04f0a48450c7f4496993dcfbeb5c2ecb095f6447f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x852E 10008 bytes