Malicious PDF — malware analysis report

Static analysis result for SHA-256 87c16b5211401a97…

MALICIOUS

PDF

44.3 KB Created: 2020-09-04 07:40:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 580ea0a3463f0d96919a863e13791d58 SHA-1: 61f771326f392696de5058c22b224d90bb2fd82c SHA-256: 87c16b5211401a971fdd59f2e9b547ca12905e9b6c42e81e78858f895626c11f
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.club/wix?keyword=outlook+app+android+sync+frequency'. This URL is designed to lure users into clicking it, likely leading to further malicious content or phishing attempts. The document also contains a large number of external PDF links, many hosted on Shopify and static.usrfiles.com, suggesting a link farm or SEO poisoning tactic to increase visibility. The embedded document body text, though heavily corrupted, contains the malicious URL and references to Outlook app synchronization, reinforcing the phishing lure.

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.club/wix?keyword=outlook+app+android+sync+frequency
    • https://cdn.shopify.com/s/files/1/0432/0998/2107/files/69529048266.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6939/files/58961624995.pdf
    • https://cdn.shopify.com/s/files/1/0437/0874/3834/files/characteristics_of_empirical_research.pdf
    • https://cdn.shopify.com/s/files/1/0437/5078/5173/files/marginal_costing_in_management_accounting.pdf
    • https://static.usrfiles.com/ugd/3b0c81_ab7e127ceb2d43e493fb12dc9706d279.pdf
    • https://static.usrfiles.com/ugd/76dd3d_f906bb800a7d4e74bdb2f3c412b091bf.pdf
    • https://static.usrfiles.com/ugd/97aff7_1ff3088d818f4b8ba292393c4e42e842.pdf
    • https://static.usrfiles.com/ugd/954c8b_313ccca2fe744064baf7ff6846736686.pdf
    • https://static.usrfiles.com/ugd/405339_06f1dbfd4f2a4962b0af537c306efa67.pdf
    • https://static.usrfiles.com/ugd/96768c_eeffe451761042d3950e299114708e61.pdf
    • https://static.usrfiles.com/ugd/82d61e_201ea60c29f6409692d3a70d2b610762.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8373fc8801e47aeabcc6c0299ed8792.pdf
    • https://static.usrfiles.com/ugd/866690_d10f168102d9452c830a86435094144f.pdf
    • https://static.usrfiles.com/ugd/45fd81_5e6eb59eacc54879a982887eef5971c6.pdf
    • https://static.usrfiles.com/ugd/b916f4_3c5dd8141f9f4c659b8be3fbea04345a.pdf
    • https://static.usrfiles.com/ugd/58a813_5436f973015c4dd396a0c4a8f57ba388.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_off00006f76.bin
b6889ceab9d9c2d4a8c5841996b65753848247464c08871d651e1c38f5583e78
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F76 5468 bytes
font_01_sfnt_off00008227.bin
c9819f45fb23d76a7323cdd92ccb5801e20083501f853684f7434e63ef53d849
pdf-font-stream PDF embedded font (sfnt) at offset 0x8227 10064 bytes