Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e0dc49dc776c9c…

MALICIOUS

PDF

52.4 KB Created: 2020-08-08 21:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5996a09e3bdf0094719613693e3ee0d7 SHA-1: dd2a878171d5bd82c92f395a90df0388fb3ab77b SHA-256: 15e0dc49dc776c9ccf4bcc4a3c71f96755b85dd49f7dfbc09fb58ec0c5e65aac
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or link farms. The document body, though heavily obfuscated, contains a URL that appears to be a lure for educational content, which is then redirected via a malicious service. This suggests a phishing or scam attempt designed to lead users to harmful sites.

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=rajkumar+biology+notes+class+12+pdf+download
    • http://files.adelaide-cancer-massage.com/uploads/1/3/0/7/130776033/92f62dbba50a4a.pdf
    • http://files.theprideofmayfield.org/uploads/1/3/1/3/131380258/ralaborojusamujosu.pdf
    • http://zodamuguf.hermanalongmore.com/uploads/1/3/1/3/131383314/duxewixuzasume.pdf
    • http://files.aucklandprintstudio.com/uploads/1/3/1/6/131637419/ramozovimeroz_kinuzar_lufazewiminup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5018/8443/files/49074911790.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0945/files/solebevipuruxojabaro.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/38716699215.pdf
    • https://cdn.shopify.com/s/files/1/0430/1553/6793/files/fasarovokixuva.pdf
    • https://cdn.shopify.com/s/files/1/0427/3248/6823/files/kowisujofonukonowuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/7157/8024/files/sutezeluzod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/befuxaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/5778/9593/files/arma_2_launcher.pdf
    • https://cdn.shopify.com/s/files/1/0433/7693/5068/files/writing_algebraic_expressions_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/9113/1557/files/6558643806.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/72719911370.pdf
    • https://cdn.shopify.com/s/files/1/0440/8023/4661/files/barbudos_sujos_e_fatigados.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_off00008c8a.bin
6bb10175829ad80d94b1ad584c66727b6f63a7f7145a5d1c75a127251f994744		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8A 6140 bytes
font_01_sfnt_off0000a184.bin
ec38fdfc6f12bf35a3ab4337231ef6ca316635aa9381a176d85c124ac408dc51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA184 10420 bytes

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