Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0e93a5c39c6b5d…

MALICIOUS

PDF

44.6 KB Created: 2020-08-18 13:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f5adc4375312c5ad2bd1ce54ce2e023 SHA-1: f95613a65017c5430d8a600edecba352cf803bdb SHA-256: 2f0e93a5c39c6b5d36fc23547787ec64a182e996d58267ff1c8aea431f6ccea1
152 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'Austria schengen visa application form uk', redirecting users to malicious infrastructure at `ttraff.com`. It also hosts a large number of external PDF links, many pointing to `cdn.shopify.com`, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL confirms the intent to lead users to harmful 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.com/pify?keyword=austria+schengen+visa+application+form+uk
    • http://raruriwen.brandywine.tv/uploads/1/3/1/0/131071073/a5f0b8e398a8a5.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/reset_autonomous_desk.pdf
    • https://cdn.shopify.com/s/files/1/0433/8155/5350/files/free_assured_tenancy_agreement_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/kali_linux_source._list.pdf
    • https://cdn.shopify.com/s/files/1/0431/7940/9568/files/jufiwipameg.pdf
    • https://cdn.shopify.com/s/files/1/0433/8948/5221/files/192159324.pdf
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/seluxemod.pdf
    • https://cdn.shopify.com/s/files/1/0431/2124/6370/files/google_docs_resume_and_cover_letter_templates.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/wefewusupojuvuvax.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/terraria_connecting_to.pdf
    • https://cdn.shopify.com/s/files/1/0431/0256/8599/files/23268115667.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1513/files/bsnl_recharge_plans_maharashtra_2020.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_off00006bf0.bin
1e40896748de48e83c3d3beb8446d197b13463444239bb5ef837ec2d9d220d03
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF0 5544 bytes
font_01_sfnt_off00007ea6.bin
17788328e1a24afb8699360169f5f040ad14d6cdcc52a333e7ea59acf1be17ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA6 11984 bytes