Malicious PDF — malware analysis report

Static analysis result for SHA-256 500af188c2f94a07…

MALICIOUS

PDF

32.9 KB Created: 2020-08-31 02:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fa770d62683f78496fe7626b72b5f6a SHA-1: 407d46c8150ae132ea42023ef2b8532abb4afe39 SHA-256: 500af188c2f94a0730b33331b3428905fe70a7a9189111b368a2a5bd418bd849
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many pointing to Shopify. The primary malicious URL, https://ttraff.com/wix?keyword=yamaha+kt100+manual, is flagged as a known malicious redirector. The document body contains garbled text but also includes the malicious URL and several benign-looking URLs, suggesting a lure to disguise the malicious intent.

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/wix?keyword=yamaha+kt100+manual
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/bahut_yaad_aati_hai_song.pdf
    • https://cdn.shopify.com/s/files/1/0430/7451/9194/files/41154113824.pdf
    • https://cdn.shopify.com/s/files/1/0437/0844/8919/files/asgore_piano_sheet_easy.pdf
    • https://cdn.shopify.com/s/files/1/0430/4302/9143/files/vawugimodijiragosusil.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/romoge.pdf
    • https://static.usrfiles.com/ugd/0a0016_e4828c7fd61943619d3f9673cb653d86.pdf
    • https://cdn.shopify.com/s/files/1/0435/1852/5599/files/mla_format_website_citation_multiple_authors.pdf
    • https://cdn.shopify.com/s/files/1/0431/2953/6668/files/70716329928.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/daxozuzenizijarinum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/magobusiriwolozun.pdf
    • https://static.usrfiles.com/ugd/5a1791_5f7ad4c991884f44aeb2c2e8b89429b5.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_ba4775a85b3d4b79ad56c22a4ded33d3.pdf
    • https://static.usrfiles.com/ugd/87a178_95d99872aec2433b984011e62b2e7f50.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_off0000462a.bin
4ffd7c25000231c89ff4ad644b9185fb464b3c7b9543d5c864a21153692348b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x462A 4868 bytes
font_01_sfnt_off00005699.bin
ddd131818336c492bc0162a1b5a2472ce182bb5331627c7a5c0fac32c27743c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5699 9608 bytes