Malicious PDF — malware analysis report

Static analysis result for SHA-256 28f760c95c01da1b…

MALICIOUS

PDF

34.8 KB Created: 2020-09-07 12:38:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bdfa64b08f07b434df38026e09b39ed SHA-1: 32d7bf959fcc08fe22eaa80ba5c8fc5132c92230 SHA-256: 28f760c95c01da1bdabba1c23cc77840919228088b11358ce33cc7b25dcbc878
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically `https://ttraff.link/wix?keyword=fly+away+home+movie+free`. This URL is presented in a context that mimics a search result for a free movie, suggesting a lure to a phishing or malware distribution site. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, likely for SEO manipulation or to obscure the malicious redirector. The ML classifier strongly supports the malicious nature of this PDF.

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=fly+away+home+movie+free
    • https://static.usrfiles.com/ugd/ac72e0_51d4ffd1cf68452cbb15a990ee28498a.pdf
    • https://static.usrfiles.com/ugd/9734e7_67b173549674408eb88482536214be3a.pdf
    • https://static.usrfiles.com/ugd/eb6612_89409f7acfa04563ba9941e2ac5df05b.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/science_grading_sheet_deped.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zotogobujadafozafinuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/2900/3416/files/antares_autotune_4_free_crack.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4899/files/15689931785.pdf
    • https://cdn.shopify.com/s/files/1/0435/4732/8664/files/information_regarding_neet_exam_2019.pdf
    • https://cdn.shopify.com/s/files/1/0438/0576/9888/files/multisyllabic_words_list.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/51528845490.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/34216210060.pdf
    • https://static.usrfiles.com/ugd/682d1c_e60b393dab0f4b0bad43b4a8a4477dfb.pdf
    • https://static.usrfiles.com/ugd/cc089a_ad1a8ce648ae42669c91c5e1d2ba3aeb.pdf
    • https://static.usrfiles.com/ugd/4f92c1_5d0b53b04bcf4f3cad6fd720416e8cfb.pdf
    • https://static.usrfiles.com/ugd/c1c462_10453c66063648a59233ec6786cace5a.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_off00004960.bin
cb90d2186b5373099b221fac37dba5d613855ba1c0caab27cd8e6d44f1686e56
pdf-font-stream PDF embedded font (sfnt) at offset 0x4960 5036 bytes
font_01_sfnt_off00005a7a.bin
cbe35000fd56d05c9cc18c098c81b0bf8e6e8cb40a8e601f16812701ed338b9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A7A 10756 bytes