Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b9da393ddf225e0…

MALICIOUS

PDF

45.9 KB Created: 2020-08-08 00:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54c6c7de53852b300956617d58366098 SHA-1: 40f5bc663ccc1ed619a41aa54a73ff5f3ac4950c SHA-256: 3b9da393ddf225e0fb6cb37ab78efe3a8b9b430c3378e1e2711653632e46b9bb
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to downloading "Btc first semester books pdf". The presence of a malicious redirector and a link farm indicates an attempt to drive traffic to malicious sites, likely for further exploitation or malware delivery. No scripts were extracted, limiting the analysis to the PDF structure and embedded URLs.

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.com/pify?keyword=btc+first+semester+books+pdf+download
    • http://files.stanleeohikhuare.com/uploads/1/3/0/7/130776111/a23d5cfd.pdf
    • http://files.sundanceretrievers.com/uploads/1/3/0/7/130740065/ea06de436e3771f.pdf
    • http://files.dynamiteimageky.com/uploads/1/3/1/4/131452733/f64f2ff458b48.pdf
    • http://files.laurenandresurbanist.com/uploads/1/3/0/7/130776151/lodimeroporadelir.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/79186947486.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6967/files/cheat_engine_6._1.pdf
    • https://cdn.shopify.com/s/files/1/0437/6464/6040/files/nra_instructor_portal.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7106/files/mathematical_statistics_with_applications_student_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/0357/5454/files/5313626073.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/30324819494.pdf
    • https://cdn.shopify.com/s/files/1/0431/0974/4789/files/93949246979.pdf
    • https://cdn.shopify.com/s/files/1/0429/1674/1286/files/12353931639.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/24631743978.pdf
    • https://cdn.shopify.com/s/files/1/0436/0781/8398/files/net_compact_flamework.pdf
    • https://cdn.shopify.com/s/files/1/0437/3646/5559/files/java_paint_program.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/samoketidepi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4827/9957/files/30392308487.pdf
    • https://cdn.shopify.com/s/files/1/0437/2119/5688/files/rocksmith_2014_all_updates_and_dlcs.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00008eac.bin
8a3ab8b45b4853d62e354c400e7d535754182a211c93c72ef7724748c29d8c1e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8EAC 8180 bytes
font_00_sfnt_off00005a53.bin
2605663a370d28b70273b703cb6d9ecde97cea339e7d7e93a624f5714b9f939e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A53 5648 bytes
font_01_sfnt_off00006d8d.bin
84665f67a5efbf13f08b539d86340e425403f8d7e2522132062341a1ecfb3fc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8D 9584 bytes

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