Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b508b995c562c8e…

MALICIOUS

PDF

38.9 KB Created: 2020-09-13 16:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3332c5e160d23957918a0722b0422ec SHA-1: 15ead370a8dd1d312fa677cb486d30404a885c6e SHA-256: 3b508b995c562c8ed70c09ae4012332f1f49376d63bc2b0009fb7f74ab64c160
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that leads to a URL containing keywords related to downloading an ebook. This is further supported by heuristics indicating a malicious redirector and a link farm, suggesting a phishing or scam attempt. The document body, though partially corrupted, contains the same lure text and URLs. The primary malicious IOC is the redirector URL, which likely leads to a further stage of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.link/wix?keyword=the+startup+owner%2527s+manual+pdf+download+ebook
    • https://cdn.shopify.com/s/files/1/0435/5165/4047/files/bigapifomidej.pdf
    • https://cdn.shopify.com/s/files/1/0431/5355/5624/files/45409942364.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2821/files/47182216528.pdf
    • https://cdn.shopify.com/s/files/1/0433/4967/2091/files/1209424215.pdf
    • https://static.usrfiles.com/ugd/12dc78_5d9f72b4ca4f45b2875b8968ad4f3927.pdf
    • https://static.usrfiles.com/ugd/40336e_5c85f9bf617549168f121190dae6cf78.pdf
    • https://static.usrfiles.com/ugd/868f76_37ba75b65f4448e6bd6baf2c1b6a112d.pdf
    • https://static.usrfiles.com/ugd/37987b_8bad72ddd9054f43bc081feefdaed278.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c3f0db402aa4661add6d593c1d3be1b.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/farmall_cub_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/xiwadugesevogexixupila.pdf
    • https://cdn.shopify.com/s/files/1/0432/8190/7870/files/79572213869.pdf
    • https://cdn.shopify.com/s/files/1/0428/2531/8563/files/jf011e_cvt.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0503/files/ziwiliri.pdf
    • https://static.usrfiles.com/ugd/15d534_3fbc837a5a074afe8c97c6b3a67e6f12.pdf
    • https://static.usrfiles.com/ugd/ed2d23_f2e1f9e6f8434d5ba0222579996ffc6c.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_off00005920.bin
79509256937e1238f841b392610f52d467837a422d3a7b9c61a193570a434773		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5920 5560 bytes
font_01_sfnt_off00006bf1.bin
05418d70374d60502cd9902da9fdc3d8e2e8e179c40fdb3f7ff1decf56bf2cd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF1 10216 bytes

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