Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf16e2aa27cb41fd…

MALICIOUS

PDF

44.2 KB Created: 2020-08-02 05:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3f6a918d4aa736e15ef7d3d9b6f86b2 SHA-1: cd22faf454f82c1caf38f3547bc718bb038dcc11 SHA-256: cf16e2aa27cb41fd6fbcac98127c53ca7e889966748470d4746644bdb54820c7
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though obfuscated, contains the same lure text and URL found in the redirector, suggesting an attempt to trick users into clicking the link. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=kuhn+tedder+parts+diagram
    • http://files.hukpdk.org/uploads/1/3/2/8/132815003/xenegofe.pdf
    • http://files.churchesreachout.com/uploads/1/3/0/7/130776055/mejogofifejuvi-sunasepisilobe-raguporedomekek-rujofebeweses.pdf
    • http://files.kathleenmarchetti.com/uploads/1/3/1/3/131380547/6565d058d12d5.pdf
    • http://files.culturemushrooms.com/uploads/1/3/0/7/130740536/ronaladapapar.pdf
    • http://files.springersofoz.com/uploads/1/3/0/7/130776147/dekeragajelelefop.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1932/files/14756204788.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/besopube.pdf
    • https://cdn.shopify.com/s/files/1/0436/9232/7077/files/sogesudagurupajizelop.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vejumilaro.pdf
    • https://cdn.shopify.com/s/files/1/0437/1516/6357/files/hard_reset_iphone_6s_plus.pdf
    • https://cdn.shopify.com/s/files/1/0430/3280/5527/files/lipigedekizipetitajaxono.pdf
    • https://cdn.shopify.com/s/files/1/0437/9426/8320/files/jifegisagabekupirejimis.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/40048504628.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56317886700.pdf
    • https://cdn.shopify.com/s/files/1/0430/0449/3987/files/telopopikajedufolazutefir.pdf
    • https://cdn.shopify.com/s/files/1/0431/2737/3986/files/salosip.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5304/files/fuxenujijalazajejozuput.pdf
    • https://cdn.shopify.com/s/files/1/0431/0374/8260/files/1717773398.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_off000072c5.bin
8b5fee1f8eaa95444f1790dd9794f1810f17560b32586802c126b992b828ddc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x72C5 5312 bytes
font_01_sfnt_off000084ac.bin
78a2515efebff1c50e14f0c540f8d9d231fd6a6a9a194f25f10a474f447dfa9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x84AC 9284 bytes