Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2dcd90e724c210a…

MALICIOUS

PDF

43.9 KB Created: 2020-08-30 06:37:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e0938b1070c337e34d2302f29c70eff SHA-1: 47fc5b42c120ffca5897c76ee8346fe0a417020e SHA-256: b2dcd90e724c210a42235918badf2dc93bbecf0774d608d5706a40dcfce69ffd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to academic papers and URLs, suggesting a lure to a malicious site. The primary attack vector appears to be a phishing attempt disguised as an academic resource.

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/wix?keyword=simon+blume+mathematics+for+economists+pdf
    • https://static.usrfiles.com/ugd/2e4eb4_ce140013a7914df0b80ea3abf7824e1c.pdf
    • https://static.usrfiles.com/ugd/89c6ad_7fca10c4cadd445c8cf02ed9f72e2659.pdf
    • https://static.usrfiles.com/ugd/b8c837_cee92d8717b9425ca8309b0d9d641a30.pdf
    • https://static.usrfiles.com/ugd/b65acf_afbc96c58d974acd915551bddaddf39b.pdf
    • https://static.usrfiles.com/ugd/b0b521_aefee29585754ddba96a2000d108cf63.pdf
    • https://static.usrfiles.com/ugd/4cf28d_fc38ee9cc4dc470fb7357818822b0beb.pdf
    • https://static.usrfiles.com/ugd/5ecadc_959051c3750f4f91ab4a6c393e2116c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f1025a04ad5401f862ceab7ce9da77f.pdf
    • https://static.usrfiles.com/ugd/067ecb_bf3b963198d8485a9e03156547ae4124.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b556fd772c44d8b82230052d94cc704.pdf
    • https://static.usrfiles.com/ugd/43d598_8dc530b696f349899b15181230cddfb7.pdf
    • https://static.usrfiles.com/ugd/e3ff21_40dc983d794346fc98f1abe40c88d23e.pdf
    • https://cdn.shopify.com/s/files/1/0453/8574/4552/files/bmp_image_viewer.pdf
    • https://cdn.shopify.com/s/files/1/0434/4905/7430/files/fiction_book_report_format.pdf
    • https://cdn.shopify.com/s/files/1/0433/5311/2735/files/35832133854.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/16848045437.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052b4.bin
06b2d224850a7db4aa3b0031afd815b6d57ffb1ab6668b3dc881e5792bfc0b0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52B4 5636 bytes
font_01_sfnt_off00006597.bin
db4a66e77069dc1bd7a8e1405142288c4e8fe0998f7625db6a122bc83f3d44a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6597 9672 bytes
font_02_sfnt_off000086be.bin
7337fb98ea55020f3b3b58ad2f3067f17937eb2e86752b2d4ea00551cf3b57bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86BE 18016 bytes

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