Malicious PDF — malware analysis report

Static analysis result for SHA-256 654c7acdfe0af4e9…

MALICIOUS

PDF

44.6 KB Created: 2020-08-11 02:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5de5b4b7f29e3fbefb91b0c806be8c06 SHA-1: 440cffa62d4f1e2a2478a6dd3e4b706cc09e6df6 SHA-256: 654c7acdfe0af4e9739e39b2647d812a4c5d056cdd9d7598697f5d0ce14ac64e
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and several other URLs that appear to be part of a link farm. This suggests the primary purpose is to lure users to malicious infrastructure, likely for further exploitation or phishing.

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.cc/pify?keyword=max+born+fisica+atomica+pdf
    • http://files.richardlouie.com/uploads/1/3/0/8/130813320/7ff79c0c9f.pdf
    • http://files.jenheerwig.com/uploads/1/3/0/7/130776499/fafalebajijonab_fewaxedem_jomivixumix_rawexo.pdf
    • http://files.tworiverscampgroundandstorage.com/uploads/1/3/1/4/131406086/5695610.pdf
    • http://files.myforextoronto.com/uploads/1/3/0/9/130969710/89951b37.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8266/8437/files/13553226940.pdf
    • https://cdn.shopify.com/s/files/1/0429/6245/2643/files/tisagifigovotadu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovovowegafakaroseras.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/widaduvisewopem.pdf
    • https://cdn.shopify.com/s/files/1/0433/8611/0110/files/install_git_on_linux.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/how_to_push_project_to_github.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/champion_air_compressor_parts.pdf
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/koseluxaxama.pdf
    • https://cdn.shopify.com/s/files/1/0447/1911/2345/files/synonyms_and_antonyms_worksheets_for_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0440/8282/3333/files/animal_cell_and_plant_cell_difference.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/xevege.pdf
    • https://cdn.shopify.com/s/files/1/0435/5260/4319/files/best_japanese_learning_books.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7645/files/92761914606.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0439/files/tisuter.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_off00007005.bin
6457a63e89fcb4d80bfe1a55488262d32e1d77992d894a01be3e60761da8736d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7005 5484 bytes
font_01_sfnt_off00008295.bin
3b9507f7a400ad0ba79fa1bac5bf91ce9e6f471509efe30eb5d3f9748101aed6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8295 10264 bytes

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