Malicious PDF — malware analysis report

Static analysis result for SHA-256 71ebabdbfd96d42f…

MALICIOUS

PDF

50.4 KB Created: 2020-08-29 21:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 619d9ce3e00dbb10b726f5141649cab7 SHA-1: df995cdee0d7d1452a260656ba5922503238d989 SHA-256: 71ebabdbfd96d42fbd05d9d4c393d25a74ca42c6fe9d73de433a6546316318c1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The presence of numerous external links suggests an attempt to manipulate search engine rankings or distribute further malicious content, rather than providing legitimate document information.

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.me/wix?keyword=batman+arkham+city+ps3+walkthrough
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_515eaca7ad8d4dcc94d13af5426e78b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_4653aad5158948bca635b0a5e4627b5e.pdf
    • https://static.usrfiles.com/ugd/f80014_9fab177a081c4f6b9074bc0031ac4805.pdf
    • https://static.usrfiles.com/ugd/b8c837_f647410999b54aa7bdbb06b87dd16016.pdf
    • https://static.usrfiles.com/ugd/b8c837_feb4ded13b18475f87ee62feb8003bf0.pdf
    • https://cdn.shopify.com/s/files/1/0432/3039/6574/files/easy_lover_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0433/9154/9590/files/tavewetukesunajotul.pdf
    • https://cdn.shopify.com/s/files/1/0437/8466/7297/files/dexadewudarole.pdf
    • https://static.usrfiles.com/ugd/856cea_2df91311f1cb4ca9bd0f92d31f38e74d.pdf
    • https://static.usrfiles.com/ugd/66c878_e8bd78ee8aa448b1a663dd8e1c17fff3.pdf
    • https://static.usrfiles.com/ugd/b8c837_a95941689db5425b9f4a0dd5103113fd.pdf
    • https://static.usrfiles.com/ugd/724fb5_025a8619771641b2bb2449a804fe7d88.pdf
    • https://static.usrfiles.com/ugd/b8c837_a69288762fdd4d4e88a891d3cd457972.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_off000086f5.bin
f989b14e33b46509912e1f0368e368923bbb063c7e512e024e7db83411e62ecf
pdf-font-stream PDF embedded font (sfnt) at offset 0x86F5 5816 bytes
font_01_sfnt_off00009aae.bin
d5e79d25cbf60dc7ef8198cbcd08128c5eb44da4e69507eac1fa9cab200f1a7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AAE 10032 bytes