Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5df0ef1fd7a7a8a…

MALICIOUS

PDF

40.5 KB Created: 2020-09-01 09:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e44898f46e567374bfcefe4139f1968 SHA-1: 645815b329c3eaff8e2a582b3a42aaaf74d4fd37 SHA-256: d5df0ef1fd7a7a8ab2d236cda397f1c972b7572ee48c55bf4d3bdf70b535de25
152 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of embedded links, suggesting a link farm or redirection scheme. The primary malicious URL identified is ttraff.com, which is likely used to obscure the final destination of the attack. No scripts were extracted, and the document body contained obfuscated text and URLs.

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=elapsed+time+practice+3rd+grade+worksheets
    • https://cdn.shopify.com/s/files/1/0464/8078/5576/files/63101263634.pdf
    • https://cdn.shopify.com/s/files/1/0428/2050/1660/files/sbi_kyc_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/fosuxanomepoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/7256/0033/files/effective_of_communication.pdf
    • https://static.usrfiles.com/ugd/0511f5_2d847ebe07df4150bbacd12eb3e202bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_1bdc95b42e6642598840b247177bcbaa.pdf
    • https://static.usrfiles.com/ugd/eb6612_3c1e316f832340f3b76d02ca6e9ad488.pdf
    • https://static.usrfiles.com/ugd/b8c837_55d396c04cf841308242185549265929.pdf
    • https://static.usrfiles.com/ugd/2274a7_7b1bdf99f69842d1a1ebe744bf172df5.pdf
    • https://static.usrfiles.com/ugd/b8c837_4804ca04b30c4059b20f13b35074033c.pdf
    • https://static.usrfiles.com/ugd/b8c837_59ea315c6e2249a7b59a97cd758be3dc.pdf
    • https://static.usrfiles.com/ugd/d94ae5_c508a33d737d4098bb10abf708aa133e.pdf
    • https://static.usrfiles.com/ugd/3e9e83_60b1bcc3bf2d4b508e03cc323fbef0ee.pdf
    • https://static.usrfiles.com/ugd/99afdc_adefb391f80a41a1a380c153d44691cc.pdf
    • https://static.usrfiles.com/ugd/b65acf_759091c6cc0d406f8c1ead1331b9700b.pdf
    • https://static.usrfiles.com/ugd/3d0627_f384a66b3687413984e726ed4a3b400b.pdf
    • https://static.usrfiles.com/ugd/ae15ca_6c96c2d281974108ab08ff5b1ae8ddd4.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_off00005fd2.bin
c5c1dbb1da5d858e0b9d5d3ebe3283c2b135a409221e63bf291238bc09da3bb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD2 5764 bytes
font_01_sfnt_off0000735f.bin
f70857e724c76ef1ec73e98436e1a9d79654b6c8b3ab4066dab8e49cd9333217
pdf-font-stream PDF embedded font (sfnt) at offset 0x735F 9796 bytes