Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f75774f1464c6dd…

MALICIOUS

PDF

56.5 KB Created: 2020-08-31 21:11:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fb0fa886194354ee4e4d60c4999456b SHA-1: 869ead682f5c331b9026fc8279083e6781415b73 SHA-256: 5f75774f1464c6dd9cf7634c0eb66e51296f35315c20e9b00d19b74f5df005ea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, a technique often used to redirect users to malicious websites. The primary redirector URL, 'https://ttraff.com/wix?keyword=numberformat+percentage+js', is flagged as malicious. The document body, though heavily obfuscated, appears to contain the same URL, suggesting an attempt to disguise its malicious nature. The presence of a large number of external PDF links, many pointing to benign content, suggests a link farm SEO tactic to obscure the malicious redirector.

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=numberformat+percentage+js
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/e2c250_20e56b720fbc4d899e79976af92ab80a.pdf
    • https://static.usrfiles.com/ugd/83b1b3_4c29960a098e474daab45bd5086a6b87.pdf
    • https://static.usrfiles.com/ugd/735424_81bffd5f609c48c388bf6dc93fef722f.pdf
    • https://static.usrfiles.com/ugd/b8c837_48dfbe299e9a4f2b8cf9536bfa38540c.pdf
    • https://static.usrfiles.com/ugd/8a419d_2905b9aa0399442a902ce6330456c56a.pdf
    • https://static.usrfiles.com/ugd/345929_e51b9fd53496469784cfa30fe6438d58.pdf
    • https://static.usrfiles.com/ugd/90423f_7d6b031d3b524dbb991728db80b5db82.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31240515614.pdf
    • https://cdn.shopify.com/s/files/1/0431/9562/9725/files/timavoje.pdf
    • https://static.usrfiles.com/ugd/de65f7_81f54555dba74921b20923af497e0488.pdf
    • https://static.usrfiles.com/ugd/b11f6d_d8998865ca9e45498747bff7c10874f4.pdf
    • https://static.usrfiles.com/ugd/9b5f63_fa0c1a2feeb44d4da3976237b40f6b41.pdf
    • https://static.usrfiles.com/ugd/b8c837_598d6818cebb42b9a47e2967aa1b1525.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006927.bin
e9fa046417e15eb42d3e06f87735f03cd2edb059433adf81ac68a9da45d52271		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6927 3848 bytes
font_01_sfnt_off000076f2.bin
6b6482b677bd4a78984fe1f5ca6feaf2ecea3e72a667757ab6de966622c3a6ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F2 5324 bytes
font_02_sfnt_off000088fa.bin
6245739f007c2dd74a47da0d1372386ae1f48a41e6a6fba87034e0c95cf484dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88FA 10520 bytes
font_03_sfnt_off0000ad13.bin
a70a155e7c0b3b26d4be0a4b440ba4519eeb0dd1bd415d7360b0a6a045acc95a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD13 17316 bytes
font_04_sfnt_off0000c691.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC691 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.