Malicious PDF — malware analysis report

Static analysis result for SHA-256 07bed2d4fbc960f1…

MALICIOUS

PDF

52.9 KB Created: 2020-08-30 08:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a43632db344fbba6baf32de45a80a92 SHA-1: ab4dd7298b83051e751864e4d8a57de16a224cd6 SHA-256: 07bed2d4fbc960f1b7ee1337866e0a08f777335392ca579b933b8922fbbce061
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector, suggesting a lure to external content. The presence of numerous links to external PDFs indicates a potential link farm or SEO poisoning attempt.

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.ru/wix?keyword=res+keyboard+shortcuts
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_7649132ef5904122b1299c1e52f472a3.pdf
    • https://static.usrfiles.com/ugd/7ff653_51fcb5a53613498098ebae73c74cda50.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d59396c198f4cf39d4cf8d6817daf74.pdf
    • https://static.usrfiles.com/ugd/b8c837_5be3f9a172cd4177b11731fd3b77c14b.pdf
    • https://static.usrfiles.com/ugd/565485_14777522fa504c14b1c4c8cf970ef8d7.pdf
    • https://cdn.shopify.com/s/files/1/0436/2554/5890/files/california_employee_report_of_injury_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/3453/3275/files/istqb_glossary_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/1347/8312/files/47807533343.pdf
    • https://static.usrfiles.com/ugd/09c3c7_fec4b7f62f424fd48ac39b1afe65b08d.pdf
    • https://static.usrfiles.com/ugd/b8c837_38c043821084448fb437f6f658a03275.pdf
    • https://static.usrfiles.com/ugd/b8c837_1229d99cadd74615a225a1d4375d81ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_eebae45992ab439ba4e4491924dd2d86.pdf
    • https://static.usrfiles.com/ugd/b8c837_5def78df6d9a4c24803373e69d6f63c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_2010f912381441b5922af6398d0e7fb7.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f15.bin
7751b59da6547bc89566296508ee13e5c217992a4ed531b42a99e72b299a2485		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F15 5036 bytes
font_01_sfnt_off00008047.bin
cf7c3a59735ce12ebe63050d75339991483daca3a93a2f1fa1ea087cb79c2604		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8047 10276 bytes
font_02_sfnt_off0000a39d.bin
b1012f06963c2aaa138b1a1b41ce61e53326fc85a5cb8e4a569fc08fe8587a25		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA39D 16096 bytes
font_03_sfnt_off0000b864.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB864 4324 bytes

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