Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8ce5b5c2e7c44f9…

MALICIOUS

PDF

41.5 KB Created: 2020-08-15 16:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e886c2e23d7b2b339fe398194bd0254 SHA-1: e0d7e5e14a50b657f44b71cd6c075382522ccf2d SHA-256: b8ce5b5c2e7c44f911455c4ea42d1289f6eb1d83090b3c55a6193417125d01c0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.ru. Additionally, it exhibits a PDF link farm, with 28 external links, many hosted on cdn.shopify.com. The document body contains the URL https://ttraff.ru/pify?keyword=measurement+worksheets+cm+mm+m, which is likely used to lure users into clicking malicious links. No scripts were extracted from this sample.

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.ru/pify?keyword=measurement+worksheets+cm+mm+m
    • http://files.funprintablesforkids.com/uploads/1/3/1/4/131438464/c1a1bc.pdf
    • http://files.exploretransform.com/uploads/1/3/0/7/130776016/2595837.pdf
    • http://files.thenakeddogboutique.com/uploads/1/3/2/3/132303307/fizuze_xadojiteronor_pewozawip_bigovul.pdf
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/wakogodimoti.pdf
    • https://cdn.shopify.com/s/files/1/0430/4843/5861/files/wewizarodazituxajes.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/85445693677.pdf
    • https://cdn.shopify.com/s/files/1/0428/8466/1414/files/28835136824.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5587/files/coller_deux_fichier_ensemble.pdf
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/23427389749.pdf
    • https://cdn.shopify.com/s/files/1/0438/4161/8082/files/brunner_and_suddarth_11th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/18168325659.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7087/files/rerarowilebasew.pdf
    • https://cdn.shopify.com/s/files/1/0449/8876/0232/files/tonojasuroxun.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6857/files/95800333851.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_off00006578.bin
7d1ecf13de5be741e866d6aae51bb8f91720babb3f60083d667102af4d431521		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6578 5168 bytes
font_01_sfnt_off000076ef.bin
4c450876c358039113e0e308b51e1f4f13bdadfe21b507f703f30413f578df65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76EF 10052 bytes

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