Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc52db227d795c93…

MALICIOUS

PDF

46.0 KB Created: 2020-08-03 07:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7383f39d316a9226f37bd77fbcad3d15 SHA-1: 2af91d7286d00e962cdaf4ed9608885b41910d44 SHA-256: dc52db227d795c930f415f4fe34e9aa7073a9f36f1c4813259e2dc3ff2fac328
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a reference to the malicious URL. The presence of a "download button" heuristic further supports the lure mechanism. The primary attack vector appears to be directing users to malicious infrastructure via a link.

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/pify?keyword=discrete+mathematics+with+applications+epp+pdf
    • http://files.wlnhelena.com/uploads/1/3/0/7/130739498/6eaa600e.pdf
    • http://files.mojowitch.com/uploads/1/3/2/6/132680796/gamekusa_rovaso_fameve.pdf
    • http://files.bettercapsonline.com/uploads/1/3/1/3/131382808/d2a908a28d08263.pdf
    • http://files.guesthouseouassaggou.com/uploads/1/3/2/6/132681229/tafizumudamariki.pdf
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/vabala.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/semakekijupuropozovokes.pdf
    • https://cdn.shopify.com/s/files/1/0440/6745/5128/files/najen.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/46527530818.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/kumiwi.pdf
    • https://cdn.shopify.com/s/files/1/0439/4260/9051/files/8710072270.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/gepaf.pdf
    • https://cdn.shopify.com/s/files/1/0439/3828/3678/files/noxokusujozana.pdf
    • https://cdn.shopify.com/s/files/1/0438/7454/9928/files/38664819422.pdf
    • https://cdn.shopify.com/s/files/1/0440/6640/6550/files/malitolujubazude.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_off000075ea.bin
3efbfe1e22fe6d097c87cdf6d19dea711bf6eb72a0435c2270b951240088bc56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75EA 5484 bytes
font_01_sfnt_off0000887b.bin
78ed8aa43c5ebbacecbcf4fefb9b67c4b211099fb8a94dc49b2e860cb2f41a9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x887B 10100 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.