Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2de3ca818f493a7…

MALICIOUS

PDF

43.0 KB Created: 2020-08-14 01:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 280591ef035c3cc783c10645a998ad0a SHA-1: 63480cd35bba30a067b6b3c1c0430cd44631e802 SHA-256: b2de3ca818f493a7f67363ac3969dc80bb0ec595874803f5efc7cb6346cf12f0
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The document body, though partially corrupted, contains the text 'Cms billing guidelines for telemedicine' and a call-to-action phrase, suggesting a lure to trick users into clicking the malicious link. The primary malicious IOC is the redirector URL.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=cms+billing+guidelines+for+telemedicine
    • http://files.mairibudreau.com/uploads/1/3/0/7/130776864/ziwawajobigogefivane.pdf
    • http://files.onecityhistoricalfoundation.com/uploads/1/3/2/7/132741433/2088774.pdf
    • http://files.wcpestcontrol.com/uploads/1/3/1/8/131871618/sasekaginododowule.pdf
    • http://miwobuja.queensimpson.com/uploads/1/3/1/4/131482995/panewa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/tinker_tailor_soldier_spy_book.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/nav_bhatia_wiki.pdf
    • https://cdn.shopify.com/s/files/1/0430/5374/4279/files/490901210.pdf
    • https://cdn.shopify.com/s/files/1/0432/1027/7025/files/27534117739.pdf
    • https://cdn.shopify.com/s/files/1/0431/8747/0494/files/vutafajid.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/gorenawuribadavotebak.pdf
    • https://cdn.shopify.com/s/files/1/0435/8130/9085/files/jipagi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6399/1717/files/97336854209.pdf
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/workforce_diversity_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0430/6042/8962/files/nozotodexe.pdf
    • https://cdn.shopify.com/s/files/1/0433/7106/9594/files/pomibelepatazuw.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_off00006279.bin
0ab6a7052282373cb6319af916ee17545927a580a6a4dcd584a126e568ba4287
pdf-font-stream PDF embedded font (sfnt) at offset 0x6279 5176 bytes
font_01_sfnt_off000073fb.bin
9c11ef12bd949de6c5225166824c503b522c055035b5fd40c12610b7e46849c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x73FB 13952 bytes