Malicious PDF — malware analysis report

Static analysis result for SHA-256 63243f29aa4b4b6c…

MALICIOUS

PDF

43.7 KB Created: 2020-08-30 02:12:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67a0fb5b26a90844c51f4a86a1a3e021 SHA-1: e82ee6b653ad4b2818ed5a1632a62ca2e120fb32 SHA-256: 63243f29aa4b4b6c0a0624d0fce06c863a975c59af16d151696ccdf224491726
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, with one prominent URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Pokemon mystery dungeon explorers of time download', likely a lure to entice users to click the malicious link. 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.com/wix?keyword=pokemon+mystery+dungeon+explorers+of+time+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/43068678903.pdf
    • https://cdn.shopify.com/s/files/1/0432/1542/1599/files/94783974649.pdf
    • https://cdn.shopify.com/s/files/1/0430/1481/5901/files/brute_force_website_password_cracker.pdf
    • https://cdn.shopify.com/s/files/1/0435/4369/1419/files/complete_guide_to_conjugating_12020_french_verbs_english_edition.pdf
    • https://static.usrfiles.com/ugd/fd3290_fec87e69f9b142658767ae63dd0f7e89.pdf
    • https://static.usrfiles.com/ugd/49be48_d11e0e4cd89143f0924bc829dd555c17.pdf
    • https://static.usrfiles.com/ugd/b8c837_666dccc875de4a9b890f7e5c2c0f4a59.pdf
    • https://static.usrfiles.com/ugd/73cb9e_0e96fe0db76247118e970b48f9c2c56b.pdf
    • https://static.usrfiles.com/ugd/576447_fc00d1e313f541f09207547ab09f1eef.pdf
    • https://cdn.shopify.com/s/files/1/0434/7052/0470/files/83794233251.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2998/files/kumikefolopedexakin.pdf
    • https://cdn.shopify.com/s/files/1/0439/0522/0763/files/redezagodejuvopog.pdf
    • https://cdn.shopify.com/s/files/1/0437/0412/3557/files/dotik.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/kokewajidosusigen.pdf
    • https://cdn.shopify.com/s/files/1/0434/0206/8131/files/707498825.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_off00005415.bin
9e2bf3cbbf17cb7b334d65cade697ca2ac3c0fd5c81aa4e4974bbce7123f4a2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5415 7012 bytes
font_01_sfnt_off00006bda.bin
af7d73ddfabd4a36e3709030e1afa19705acf8eb9658fbed0bed71eca5aba105		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDA 5688 bytes
font_02_sfnt_off00007f41.bin
e089b83d4f388b39fa6993cbd6dec38a83da74c3eb4b88574fea703689d92623		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F41 9920 bytes

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