Malicious PDF — malware analysis report

Static analysis result for SHA-256 4987e09de1d9c978…

MALICIOUS

PDF

47.2 KB Created: 2020-08-25 05:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8e99255e9eee3c95cbacd850ef59f20 SHA-1: 6aa6f7839151bc504e089511515cc4433dfb4a6e SHA-256: 4987e09de1d9c97869d51839d41c2c8af18f334ddb3a25ee563fc3802f514139
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL is https://ttraff.com/pify?keyword=interactive+storytelling+android+games, which is likely used to redirect the user to a phishing or malware site. The document body and embedded links suggest a lure related to 'interactive storytelling android games'. The ML classifier strongly supports the malicious nature of this PDF.

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=interactive+storytelling+android+games
    • http://files.gccraftsanddesigns.com/uploads/1/3/0/7/130739117/jojunikedagos.pdf
    • http://files.poehaku.com/uploads/1/3/1/6/131607239/ab7f23f.pdf
    • https://cdn.shopify.com/s/files/1/0434/8585/5897/files/85399521730.pdf
    • https://cdn.shopify.com/s/files/1/0429/7742/7609/files/runafoxufinuzozerixix.pdf
    • https://cdn.shopify.com/s/files/1/0448/2813/1485/files/3d_racing_games_apk_mod.pdf
    • https://cdn.shopify.com/s/files/1/0437/6952/8471/files/enthusiastic_sinners_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/9376/9894/files/43643103552.pdf
    • https://cdn.shopify.com/s/files/1/0438/4774/5698/files/badokodu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4975/3493/files/bukunoberolov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/94993441687.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7920/files/mosfet_gate_driver_selection_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/rearrange_pages_acrobat_xi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2516/2652/files/jolil.pdf
    • https://cdn.shopify.com/s/files/1/0454/3342/1982/files/spreadsheet_compare_office_2016.pdf
    • https://cdn.shopify.com/s/files/1/0432/8197/3416/files/official_receipt_template_word_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0437/5783/0293/files/lowololajesazug.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c32.bin
2c76aeddece8bae40e1495c8fd2323ddda07e7acb6386b2b7e047809abca089a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C32 5360 bytes
font_01_sfnt_off00007e4c.bin
65b349d5197d85d6ecf439af44d2d35024496caa2658652b8a0573bf37b8cddc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4C 5468 bytes
font_02_sfnt_off00008d12.bin
19144dc3d3d58d31caae45cac5b5fb081c92ef4d8f33c296dae796a1eaa2c171		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D12 10060 bytes

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