Malicious PDF — malware analysis report

Static analysis result for SHA-256 483e9ed8e92c7268…

MALICIOUS

PDF

49.1 KB Created: 2020-08-08 22:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 020fc248db633e5fcc5445cbd188452f SHA-1: 04ff85c5f36b27af950d99fc4c9500cc0e38d787 SHA-256: 483e9ed8e92c72682f3e779360c30fc612cfcc9916d4d8c55322640a4976ec52
128 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.cc. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for "Mcse notes server 2016 pdf" with a call-to-action button. The PDF also hosts a large number of links to other PDFs on Shopify domains, likely for SEO manipulation to improve search engine ranking for malicious content. The primary malicious URL is https://ttraff.cc/wb?keyword=mcse%20notes%20server%202016%20pdf.

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.cc/wb?keyword=mcse%20notes%20server%202016%20pdf
    • http://bunoko.cloudy-shirts.com/uploads/1/3/2/7/132740405/pepuji_donamoguzix_bemugexig.pdf
    • http://files.artscollective.co.nz/uploads/1/3/1/4/131437385/fe2aa96a.pdf
    • http://files.thejoyrideco.com/uploads/1/3/2/6/132696171/651af81e2daf.pdf
    • http://files.onceuponaneden.org/uploads/1/3/2/7/132712661/fc764e23bc1b85.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/68103167736.pdf
    • https://cdn.shopify.com/s/files/1/0436/2102/3904/files/antibiotics_definition.pdf
    • https://cdn.shopify.com/s/files/1/0437/6566/1853/files/nonlinear_dimensionality_reduction.pdf
    • https://cdn.shopify.com/s/files/1/0429/5219/6249/files/zigan.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1825/files/jilimupawanebojagatujumuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0536/1821/files/windows_medea_player_9.pdf
    • https://cdn.shopify.com/s/files/1/0429/1382/4927/files/47494622888.pdf
    • https://cdn.shopify.com/s/files/1/0432/3658/9730/files/21726600417.pdf
    • https://cdn.shopify.com/s/files/1/0430/6052/7253/files/37110423867.pdf
    • https://cdn.shopify.com/s/files/1/0437/3377/8597/files/jazufiropisoxazelibu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8144/1181/files/loophole_in_lsat_logical_reasoning.pdf
    • https://cdn.shopify.com/s/files/1/0430/3300/2145/files/54256870498.pdf
    • https://cdn.shopify.com/s/files/1/0437/0356/6486/files/62687385494.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9590150980.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_off000080f9.bin
25f1f2c3eac91a51706360362cb36932097131294bce38979fb0bcf1bd68c3bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x80F9 5452 bytes
font_01_sfnt_off000093b3.bin
c79478f3575d8ec05bf72c6e353381fb4bf6d09756e84208d020dfd899fa92a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x93B3 10524 bytes