Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e237670d2b8cd2e…

MALICIOUS

PDF

41.0 KB Created: 2020-08-17 06:19:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d0536e8d6f9c16bb4c4fae721e671d9 SHA-1: fb2be5e291caeb130d7fc13ada9f42a3d3bfbe5d SHA-256: 0e237670d2b8cd2e7bf84458af4d3ab73a3e9597cd8b3301f6039fe4ec0dbf1c
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to potentially malicious or unknown domains, indicating a link farm or redirection scheme. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a link to 'ttraff.com', suggesting a malicious redirector. The presence of numerous external PDF links, as noted by 'PDF_SEO_LINK_FARM', further supports the idea that this document is designed to distribute or link to other malicious content, potentially for SEO manipulation or to host malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=black+wallpaper+mobile
    • http://files.threegratitudes.com/uploads/1/3/0/7/130740625/vixumugog.pdf
    • http://files.brokerluxuryyacht.com/uploads/1/3/0/7/130739143/3836114.pdf
    • http://wopebegug.crushcop.com.au/uploads/1/3/0/8/130873826/tevelazedadovew_nexagamabezox_boxeporu.pdf
    • http://mosab.divinebeautyexplored.com/uploads/1/3/2/8/132814930/da009d.pdf
    • http://files.chenweimeng.com/uploads/1/3/2/7/132740692/7bfe94808.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/longman_academic_reading_series_5_student_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/0627/9323/files/27833242561.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/tipunixoratevalonopa.pdf
    • https://cdn.shopify.com/s/files/1/0436/7689/3334/files/saw_5_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8965/files/mr_heater_troubleshooting.pdf
    • https://cdn.shopify.com/s/files/1/0432/8970/6664/files/481809900.pdf
    • https://cdn.shopify.com/s/files/1/0451/8638/4023/files/vugotejugepu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/buxidumex.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/wekudulapokipita.pdf
    • https://cdn.shopify.com/s/files/1/0433/5186/7557/files/donation_value_guide_for_medical_equipment.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/714218511.pdf
    • https://cdn.shopify.com/s/files/1/0437/0422/1849/files/zejatiteruremu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000636d.bin
23dbed17f52a336c81101805c06297d2fff0b77d5f7d7a2caff1099924e34607		 pdf-font-stream PDF embedded font (sfnt) at offset 0x636D 5244 bytes
font_01_sfnt_off00007539.bin
07753807b2bd5e8a60b772ee61c3775864068acd324e452b96786ef2e490e572		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7539 9900 bytes

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