Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd48636a1f118b2…

MALICIOUS

PDF

45.0 KB Created: 2020-08-29 22:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb1ca3c56245e730bc34e342e1b4f846 SHA-1: 2a9f077e847c2d36434348b4411ef10c7d563f8b SHA-256: bfd48636a1f118b28fa224d6765e03febceb7cf1d095eb655e191c02a919d768
152 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One such link, https://ttraff.me/wix?keyword=no+man%2527+s+sky+crafting+tree, is identified as a malicious redirector. The ML classifier strongly indicates maliciousness, and the PDF structure itself is suspicious due to duplicate object bodies. The document body text, though heavily obfuscated, contains the malicious URL, reinforcing the lure.

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.me/wix?keyword=no+man%2527+s+sky+crafting+tree
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/jogos_psp_utorrent.pdf
    • https://cdn.shopify.com/s/files/1/0435/7101/9935/files/circuit_training_workout.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3286/files/lisefedobupapilovataxu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/85427812883.pdf
    • https://cdn.shopify.com/s/files/1/0437/0409/0777/files/15217613117.pdf
    • https://static.usrfiles.com/ugd/ba3095_5feffc6ff43842fe98d2b3bc8bb5c3dc.pdf
    • https://static.usrfiles.com/ugd/269bb8_53836f8be5c445129d9d4f1d7dfc4acb.pdf
    • https://static.usrfiles.com/ugd/3cb679_7a70207e97624be4a998ab43fc2b3265.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b97337ce6814cd8830409d92ae1f946.pdf
    • https://cdn.shopify.com/s/files/1/0432/0935/9520/files/land_of_the_lost_zarn_voice_actor.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6070/files/analog_and_digital_communication_interview_questions_and_answers_filetype.pdf
    • https://cdn.shopify.com/s/files/1/0435/8320/9633/files/sharechat_app_karo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/pocket_god_walkthroughs.pdf
    • https://cdn.shopify.com/s/files/1/0432/3206/7739/files/bujaratepozujitizuledur.pdf
    • https://cdn.shopify.com/s/files/1/0436/9186/8313/files/ruxatapamejusejuna.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6641/files/the_everything_learning_german_book_free.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_off00007155.bin
767c39d63fd52e1e8d06de3ef70eae71d684b42db870f335cdfa34bf1073277f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7155 5340 bytes
font_01_sfnt_off00008376.bin
161636eae94283a0ab3a105ddee8d5cbc9798f58fc9c293c535b3315fe61672b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8376 10428 bytes

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