Malicious PDF — malware analysis report

Static analysis result for SHA-256 0179047bdb5d6cc4…

MALICIOUS

PDF

45.7 KB Created: 2020-08-28 06:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77db23dee55355bcc18a2fa37ea47c26 SHA-1: 67df8491c0f287e73e7b44654c65f124b74baa08 SHA-256: 0179047bdb5d6cc42b180980bb3d8d0c12192fd2bb01849c3264c86c475d1155
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=kh+rechain+of+memories+iso+download', suggesting a lure to download potentially malicious content. The ML classifier also strongly indicated maliciousness.

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=kh+rechain+of+memories+iso+download
    • http://files.katelyns-creations.com/uploads/1/3/1/4/131437249/xukatewemavipu.pdf
    • http://firise.cheekyteach.com/uploads/1/3/0/7/130739415/30da5b2.pdf
    • http://podilexi.rintheyordle.com/uploads/1/3/1/0/131069934/5552507.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/7675/5349/files/php_mem_usage.pdf
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/vokosatesudebolil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voxetevew.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/civicus_report_2017.pdf
    • https://cdn.shopify.com/s/files/1/0427/9356/6364/files/21544023254.pdf
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/6335575785.pdf
    • https://cdn.shopify.com/s/files/1/0430/6052/7265/files/92047115289.pdf
    • https://cdn.shopify.com/s/files/1/0431/4103/8229/files/34965656605.pdf
    • https://cdn.shopify.com/s/files/1/0435/1783/7467/files/lidanuwimogok.pdf
    • https://cdn.shopify.com/s/files/1/0438/6874/9979/files/important_days_in_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/9255/7462/files/majalomivibibaxixusugifir.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/best_book_for_english_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0428/1283/3959/files/zebegikalovapixitofi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006716.bin
c95436ff032fa1e60e44f6409e7581622580826f0b58913c49063f084d41086c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6716 5028 bytes
font_01_sfnt_off00007800.bin
5178cefc9aac7811353b6cd3c62727ac21082e1af7bb52ec3067d4aafaa7185f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7800 10392 bytes
font_02_sfnt_off00009b56.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B56 4324 bytes

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