Malicious PDF — malware analysis report

Static analysis result for SHA-256 c360195220604a87…

MALICIOUS

PDF

62.1 KB Created: 2020-08-07 20:17:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ca55297e37b300fe83b253eb75682b0 SHA-1: 0f7661a60c1ea8981fcd3a1501ead55662fd526f SHA-256: c360195220604a874271b335f46d6508cbc76d8fa5136aa7b7db2da0c92c36be
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Another critical heuristic indicates a PDF link farm, with the primary link leading to a Shopify URL. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and other Shopify URLs, suggesting a lure to external 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=man+booker+prize+2020+pdf
    • http://mugiso.breakicemarketing.com/uploads/1/3/0/7/130775934/towerudavotugasaben.pdf
    • http://files.drdetailcellular.com/uploads/1/3/1/8/131871494/2246963.pdf
    • http://files.deannaheathrealty.com/uploads/1/3/1/3/131398164/6339578.pdf
    • https://cdn.shopify.com/s/files/1/0446/3286/6979/files/python_execute_shell_command.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3481/files/45267416566.pdf
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/impact_of_globalisation_in_education.pdf
    • https://cdn.shopify.com/s/files/1/0432/0673/8079/files/2008_ap_calculus_ab_free_response.pdf
    • https://cdn.shopify.com/s/files/1/0440/4386/2181/files/gakowa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/application_of_cloud_computing_in_libraries.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/621226866.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/22076749209.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/83585594633.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3610/files/46289674251.pdf
    • https://cdn.shopify.com/s/files/1/0429/2752/1948/files/73097361053.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7415/files/halo_ce_product_key.pdf
    • https://cdn.shopify.com/s/files/1/0434/1353/6925/files/70532764507.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_off0000a95f.bin
34067ce2199c1536f39e9f339d2678d6b57e78df5ab233ec9d161a109cb1823d
pdf-font-stream PDF embedded font (sfnt) at offset 0xA95F 5360 bytes
font_01_sfnt_off0000bbbe.bin
521d09461646a4de45fa396a40ae145b0d1afe45cddc97010778b8c72d57e954
pdf-font-stream PDF embedded font (sfnt) at offset 0xBBBE 15428 bytes