Malicious PDF — malware analysis report

Static analysis result for SHA-256 c65d3e334a340e54…

MALICIOUS

PDF

40.5 KB Created: 2020-08-30 09:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d3a54a3ea2ae86fdc67ab5d9e52ec62 SHA-1: 33198c6441b8d62bafb396904fce705866ed4604 SHA-256: c65d3e334a340e5428d1801fcf5d702698e6fccc75068eb59db01a100c08a53e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a direct link to a known malicious redirector, ttraff.cc. The document body, though heavily obfuscated, contains the same search query as the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample.

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/wix?keyword=na+na+na+karan+aujla+song+download
    • https://cdn.shopify.com/s/files/1/0432/8289/0912/files/battery_tender_plus_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6343/files/7981926391.pdf
    • https://cdn.shopify.com/s/files/1/0430/7435/5351/files/46039929636.pdf
    • https://cdn.shopify.com/s/files/1/0437/1018/5621/files/bocconia_arborea.pdf
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/jodemibakekavalel.pdf
    • https://cdn.shopify.com/s/files/1/0434/6927/5286/files/5166561129.pdf
    • https://cdn.shopify.com/s/files/1/0438/5597/0464/files/91122880195.pdf
    • https://static.usrfiles.com/ugd/b56239_6e99191880ce40a1a974b77556dbeec8.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_a065d1323f7e45bdbb0f4ff21b5e7eb2.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/allianz_travel_claim_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1121/files/mowejiw.pdf
    • https://cdn.shopify.com/s/files/1/0439/0787/4984/files/moxidojarekipuda.pdf
    • https://cdn.shopify.com/s/files/1/0432/7702/5446/files/natal_chart_reading_free_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9800/files/faxizowuvurafekaxukiverox.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_off000051c9.bin
245f9259508e3506ce2dfc617036f65b4cc31c40658355d3eb2e67e75b351583
pdf-font-stream PDF embedded font (sfnt) at offset 0x51C9 5192 bytes
font_01_sfnt_off00006397.bin
a9b39041ad8faf9b77e9a8c7e5ef0a42680467817b3bcad9b1faf9fe2404bd15
pdf-font-stream PDF embedded font (sfnt) at offset 0x6397 15500 bytes