Malicious PDF — malware analysis report

Static analysis result for SHA-256 b87e70a111ae027d…

MALICIOUS

PDF

41.9 KB Created: 2020-08-09 01:26:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d26a7dbb6b8da104d343ea6404e58c48 SHA-1: 3ef960edee788ee35a4f337002b6b9c52cb6e4bd SHA-256: b87e70a111ae027df7a36b5889198e3e9293c120833186da704929235a8e0a19
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector, indicating a phishing or scam attempt. The primary malicious URL identified is ttraff.com, which is used in conjunction with a lure related to 'gemstone meaning chart pdf'. The document body itself contains obfuscated content and the target URL, further supporting the malicious intent.

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=gemstone+meaning+chart+pdf
    • http://files.odyssey.farm/uploads/1/3/1/4/131409677/lomorigagogabem_bufobazuna_bifekimifiw.pdf
    • http://files.donnaesplendesign.com/uploads/1/3/0/8/130813381/tutokesigakukexituki.pdf
    • http://subex.thutupallilab.com/uploads/1/3/0/8/130814328/4629852.pdf
    • http://files.balloontwistersdcvamd.com/uploads/1/3/0/9/130969375/gipagazovupibiz_tolokaduwimola.pdf
    • http://files.sharecroppersfarm.com/uploads/1/3/1/4/131412426/lomubinip.pdf
    • https://cdn.shopify.com/s/files/1/0439/3258/2056/files/35145289792.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/94199491043.pdf
    • https://cdn.shopify.com/s/files/1/0440/5883/7142/files/samsung_branding_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0436/7751/5929/files/samedejunilodire.pdf
    • https://cdn.shopify.com/s/files/1/0430/7160/2855/files/99431994370.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0979/files/xasagibeferovanerepep.pdf
    • https://cdn.shopify.com/s/files/1/0432/3331/2925/files/92858837625.pdf
    • https://cdn.shopify.com/s/files/1/0437/8660/0609/files/nakibesoxagudiluf.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/20131180934.pdf
    • https://cdn.shopify.com/s/files/1/0433/9620/2661/files/capture_the_flag_rules.pdf
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/35525058055.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/xudurezujesanajewa.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_off000064e1.bin
d5c17a984b5fc7f575e69d398c75d71238a725fa7e6d047a16b6300f16d4d310		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E1 5568 bytes
font_01_sfnt_off000077a9.bin
5811a110e3ab58ba5d372610f010d2690a15b8d1bbd90208f5a3e3a09cfb0e1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A9 10300 bytes

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