Malicious PDF — malware analysis report

Static analysis result for SHA-256 5433f62f179c920e…

MALICIOUS

PDF

41.7 KB Created: 2020-09-17 02:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d704b6c82e069e2649bb9de4b47fa656 SHA-1: 2096473d2fc2c635f1a82c70df40ba5bcc835a1b SHA-256: 5433f62f179c920e1505bc51b8791ac8bfd78464a7f2550986bb7f0a941d2633
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a game, alongside numerous other PDF links hosted on Shopify. The primary malicious URL is a redirector designed to send the user to further malicious 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.link/wix?keyword=sift+heads+world+act+2+shopping+a+head
    • https://cdn.shopify.com/s/files/1/0440/8547/7541/files/anatomie_des_menschen_kostenlos.pdf
    • https://cdn.shopify.com/s/files/1/0431/6128/8868/files/nubepobubexozibipibub.pdf
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/futodabatazubazojob.pdf
    • https://cdn.shopify.com/s/files/1/0431/1246/4535/files/61446423893.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4016/files/crimson_peak_art_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/5353/0782/files/glittering_key_chest_ship.pdf
    • https://cdn.shopify.com/s/files/1/0432/1784/6427/files/60480386689.pdf
    • https://cdn.shopify.com/s/files/1/0432/6811/2550/files/24910079877.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/breast_cancer_awareness_campaign.pdf
    • https://cdn.shopify.com/s/files/1/0430/6901/4177/files/88878400736.pdf
    • https://cdn.shopify.com/s/files/1/0435/3179/6634/files/biomedicina_estetica.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/75265196894.pdf
    • https://cdn.shopify.com/s/files/1/0463/2766/0706/files/xatavinexaravekowurane.pdf
    • https://cdn.shopify.com/s/files/1/0430/4224/2709/files/poluf.pdf
    • https://4cf3f714-94e1-4f1c-811c-d6b3a915ff5e.filesusr.com/ugd/8ba634_11eb22d6fedc4255ba2bf6b08fba8811.pdf?index=true
    • https://db5171a9-a924-474b-9cd1-399cca66ced1.filesusr.com/ugd/b361c6_182cc3e907b2465797ccc121db2f26fe.pdf?index=true
    • https://b3965eae-43b0-43dc-85ad-46e23b70ed35.filesusr.com/ugd/ed1d2e_8ca9d9d7e43b42c5aa1643824db0eb89.pdf?index=true
    • 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_off000061fe.bin
f9ddc03b99d1ae1cea7294c2570d76dbf7c9b6286755e6645b5feecf6f33fd2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61FE 5744 bytes
font_01_sfnt_off000075a6.bin
9f0a3ea98c25c437aa893b0ec06968db0cb6de61adce418db1f414c6d4877e6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A6 10520 bytes

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