Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db0da41fd9070f8…

MALICIOUS

PDF

42.2 KB Created: 2020-08-25 16:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a09ccaf1ae973b4c964838c9f18430ac SHA-1: 14677de8249dadeb46e6a688d4df15bdf42211d6 SHA-256: 4db0da41fd9070f85375904cb835e25e02719c106c977b5c751027abee4b36bf
150 Risk Score

Malware Insights

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

The PDF document contains a deceptive lure, presenting itself as a "Oneplus bug report email" to trick users into clicking a malicious link. This link, `https://ttraff.ru/pify?keyword=oneplus+bug+report+email`, redirects to known malicious infrastructure. The document also functions as a link farm, containing numerous links to PDFs hosted on various domains, likely for SEO manipulation or to distribute further payloads. 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.ru/pify?keyword=oneplus+bug+report+email
    • http://zasuful.tmorganramirez.com/uploads/1/3/1/0/131069934/9000859.pdf
    • http://vutumelum.arsenicmedia.com/uploads/1/3/1/6/131636612/lapaperuw.pdf
    • http://lobewo.victorybaptist-wf.org/uploads/1/3/1/4/131407406/zeziribe_dided_toganotiwuwo.pdf
    • http://gusiso.caribooliteracy.com/uploads/1/3/0/8/130814058/patusawoxine.pdf
    • http://nedud.cathyrevellforcitycouncil.com/uploads/1/3/1/3/131379874/kefiwav_lobobamub_titobibabup_xobedexonumilof.pdf
    • https://cdn.shopify.com/s/files/1/0429/4426/6399/files/99606556692.pdf
    • https://cdn.shopify.com/s/files/1/0430/1396/3939/files/cobia_fishing_report_virginia.pdf
    • https://cdn.shopify.com/s/files/1/0439/1868/8424/files/17964377403.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/60530987254.pdf
    • https://cdn.shopify.com/s/files/1/0449/1198/4795/files/marksheet_of_class_10_2018_karachi_board.pdf
    • https://cdn.shopify.com/s/files/1/0428/7699/3702/files/pazuzomakozuzitepir.pdf
    • https://cdn.shopify.com/s/files/1/0433/3128/9256/files/1506177495.pdf
    • https://cdn.shopify.com/s/files/1/0449/3754/3848/files/transition_to_advanced_mathematics_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/5960/9753/files/magic_the_gathering_mac.pdf
    • https://cdn.shopify.com/s/files/1/0444/3072/1190/files/boolean_algebra_in_computer.pdf
    • https://cdn.shopify.com/s/files/1/0435/5339/0741/files/46412705177.pdf
    • https://cdn.shopify.com/s/files/1/0432/8508/6364/files/kindergarten_worksheets_missing_letters.pdf
    • https://cdn.shopify.com/s/files/1/0433/6661/3141/files/bukhari_shareef_arabic.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_off00006687.bin
9db8be935ff152545d316beecd384042a0a2dc820ca18bd05e418379543cd31a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6687 5308 bytes
font_01_sfnt_off00007870.bin
56f0af7fd01c616ac50b6c7201faab68072a4e5dec5433e0bd46e7f90cd1a299
pdf-font-stream PDF embedded font (sfnt) at offset 0x7870 10224 bytes