Malicious PDF — malware analysis report

Static analysis result for SHA-256 da26a42a303f18c1…

MALICIOUS

PDF

41.0 KB Created: 2020-07-11 04:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12a314f9ec2244dfbc280d09215232af SHA-1: 194eddf40fa178155c118fd4fc07d9cedb1490c9 SHA-256: da26a42a303f18c1084eec50a3134de490133983f0d680ddd8dd651570033647
128 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a link farm designed for SEO manipulation. One prominent link redirects to a known malicious infrastructure at 'ttraff.ru', suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, contains the phrase "Autodesk revit 2014 tutorials pdf free download" and the malicious URL, reinforcing the lure.

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.ru/pify?keyword=autodesk+revit+2014+tutorials+pdf+free+download
    • http://files.stitchmastersltd.com/uploads/1/3/0/8/130813923/4f5fc437a4.pdf
    • http://files.theteccas.com/uploads/1/3/1/4/131453946/ruzuj.pdf
    • http://files.edvid.com/uploads/1/3/1/4/131438692/3983146.pdf
    • http://files.hamiltonpinekennels.com/uploads/1/3/0/7/130775347/muwuxata.pdf
    • http://files.fasteddiesworldofspeed.com/uploads/1/3/1/8/131856365/8492d7d1b.pdf
    • http://files.ladymaeimpressions.com/uploads/1/3/1/3/131379434/ba398.pdf
    • http://files.tinagutierrezartsphotography.com/uploads/1/3/0/7/130775383/remax-taxopugazaledu-fuluxibejurifuj-lavosiraleset.pdf
    • http://files.proyecto1867.com/uploads/1/3/2/3/132302913/mozolejemi-vexiramiga-leselu.pdf
    • http://files.singersandactorsworkshop.com/uploads/1/3/2/7/132740218/mubazaxumadajag.pdf
    • http://files.metalmeltdown.com/uploads/1/3/0/7/130775755/36f932b68a.pdf
    • http://files.writepathint.com/uploads/1/3/1/4/131408537/topazexofaro.pdf
    • https://melixoxozure.files.wordpress.com/2020/06/tisejafuwotilebojokeruna.pdf
    • https://nilalazage.files.wordpress.com/2020/07/rofilela.pdf
    • https://sotarobimubu.files.wordpress.com/2020/06/fozenipugetiluza.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lunizededalusabunis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7074967355.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jedufejaselikaruratemop.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0423/files/78834755587.pdf
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/zetapisifolowus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.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_off00005fb8.bin
49b9a66256263bf3675a66bdcd53bb010a7e8ff3218536efbe205d4d35e9a80f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB8 5536 bytes
font_01_sfnt_off000072ba.bin
2dc40270543b1d71ed863638298d54203b3ef65b64858ccb562d7f18ab2fa8c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72BA 10680 bytes

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