Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf55e6ff8e13fd0…

MALICIOUS

PDF

34.9 KB Created: 2020-09-01 04:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b247957ee97c6c3eaafb384d2591b32 SHA-1: 62f2359bf98e29022be86b2831b936ce57c037cd SHA-256: baf55e6ff8e13fd020446da7d5cff22509b3207ef1ec3324200db08f32d86245
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a critical heuristic identifying one as a known malicious redirector. The document body, though heavily obfuscated, also contains the URL https://ttraff.com/wix?keyword=jhankar+beats+movie+songs++pagalworld. The presence of a link farm with 22 external PDF links further suggests a malicious intent to direct users to potentially harmful content.

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=jhankar+beats+movie+songs++pagalworld
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/heterozygous_familial_hypercholesterolemia_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2406/files/88979686270.pdf
    • https://cdn.shopify.com/s/files/1/0433/6009/2309/files/47725232900.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/pdf_catalog_bearing_skf.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/bodekij.pdf
    • https://static.usrfiles.com/ugd/1a89c8_addefc6a1c904caeb54c4ac856fc7a66.pdf
    • https://static.usrfiles.com/ugd/3d0627_bd270cf963d94ab2a1ff9e6767526daa.pdf
    • https://static.usrfiles.com/ugd/c0b427_ab03d5b47a374c08970c4bd08b92b29c.pdf
    • https://cdn.shopify.com/s/files/1/0435/1823/0688/files/23196394040.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/ionic_and_covalent_bond_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/8181/0599/files/anastasia_movie_free.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_off000049d2.bin
8e06f6b8248642a2730c3b9a454e25d6236209089ea5b9b3f92b211df6ac52b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49D2 5716 bytes
font_01_sfnt_off00005d2c.bin
5c430defc15798e4bd8a4f1c4fc57ed251038d3627022b3e65df2de6d5b88d20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2C 9932 bytes

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