Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb36c90dc99f4f0…

MALICIOUS

PDF

40.5 KB Created: 2020-08-26 12:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a9ad9f89713859e9587ebbcf905e366 SHA-1: c7bbdce24044f094e6281d6109faeb88e3b50e5e SHA-256: adb36c90dc99f4f0cfb3481a34db346cc375190e6d8967610cbb3eed50db615f
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=free+printable+preposition+worksheets+for+grade+1'. The document body, though heavily obfuscated, contains a similar URL and appears to be a lure for educational materials. The presence of a link farm heuristic further suggests malicious intent to distribute links. No scripts were extracted from this sample.

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.
  • 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
  • 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.cc/pify?keyword=free+printable+preposition+worksheets+for+grade+1
    • http://files.domace-vino.net/uploads/1/3/1/0/131071166/6627406.pdf
    • https://cdn.shopify.com/s/files/1/0435/0168/2843/files/bermuda_triangle_movie_2017_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/hunger_games_chapter_25.pdf
    • https://cdn.shopify.com/s/files/1/0432/2639/8888/files/brick_house_tavern_menu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7660/7390/files/birla_sun_life_vision_life_income_plan.pdf
    • https://cdn.shopify.com/s/files/1/0433/2548/9305/files/anatomy_atlas_2018_apk.pdf
    • https://cdn.shopify.com/s/files/1/0433/3623/7206/files/25699304445.pdf
    • https://cdn.shopify.com/s/files/1/0433/6631/8230/files/damipigoduvizelasula.pdf
    • https://cdn.shopify.com/s/files/1/0439/7511/4910/files/62534464914.pdf
    • https://cdn.shopify.com/s/files/1/0434/5066/3073/files/felazugejiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/rotalaju.pdf
    • https://cdn.shopify.com/s/files/1/0431/8222/7617/files/birthday_cake_images_free_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0431/7652/5988/files/avira_antivirus_security_pro_cracked_apk.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_off00005af0.bin
2955dfc6e17efcb77989ac1c2e6e87cd2a37317a4168bc97a02dd1ffa6fa00d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF0 5604 bytes
font_01_sfnt_off00006e00.bin
af35aa3b21307edd6a75449ea9ba540ccf44f624d88105eb258daacd38b8c8fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E00 11452 bytes

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