Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd09a3e96bafc318…

MALICIOUS

PDF

39.3 KB Created: 2020-09-17 08:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44b10c6634ca58427ba747f2028b33cf SHA-1: cc1ff9fa659a7d351700aa452b400a5ec3b5f1a1 SHA-256: fd09a3e96bafc3186831ad0a1d73988b5bc6a465afe9da995175e59b2266ed47
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the string '2k16 download apk' and the malicious redirector URL, suggesting a lure to download potentially malicious Android application packages. The presence of numerous PDF links, many benign, likely serves to obscure the malicious intent and evade detection.

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.link/wix?keyword=2k16+download+apk
    • http://files.e67agency.com/uploads/1/3/1/4/131407571/7038982.pdf
    • http://files.truewealthfg.com/uploads/1/3/2/7/132710687/migejowo.pdf
    • http://files.elixrpickup.com/uploads/1/3/1/4/131438423/xatojojifima.pdf
    • https://3cec926c-fd27-4c3d-9b02-f82c4eea4bb5.filesusr.com/ugd/12daa7_9bb45c4520a0414b9ab0489cc51e51fc.pdf?index=true
    • https://80312c28-df3b-44c1-b69f-f41246cdf596.filesusr.com/ugd/b73feb_41da1b02f6ef4e7d856aae7126bf297d.pdf?index=true
    • https://66b36d59-06ab-4732-aa35-1ebaf4522759.filesusr.com/ugd/3f8d85_0c7b0bb7085e4b38a0a32a4d2be638dd.pdf?index=true
    • https://26854c48-a034-4159-9b8c-d4ec716eeb30.filesusr.com/ugd/717a42_6ee954bf55604d2caad585fe13fa479b.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0430/7304/4642/files/44995913442.pdf
    • https://cdn.shopify.com/s/files/1/0433/5845/3918/files/55611289500.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2166/files/96468943232.pdf
    • https://5dfb6536-a6ae-440a-ab46-b87bee071a4f.filesusr.com/ugd/f09a9d_e92f2bb1cea6417791a7ccd1ffcd0136.pdf?index=true
    • https://e08c7630-b5c7-46de-b1b3-09f64f4e4e40.filesusr.com/ugd/b56239_5a5553c5b894419e84431954e4280264.pdf?index=true
    • https://11520358-7272-4169-a16e-c95be67cf760.filesusr.com/ugd/96564c_f519638ae0184f8ba872f34a268c3fb0.pdf?index=true
    • https://200cbb3a-f808-11ea-a328-fc4dd43d38a6.filesusr.com/ugd/fd4c29_f8822443eeda4fc98dff82760e6ff4bd.pdf?index=true
    • 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_off00005c1c.bin
74ad7917dd4de880f0b42cec6377447520fc4ac701b2787f132e0a09a009c6ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1C 5080 bytes
font_01_sfnt_off00006d93.bin
36d9fbc0689fed82c5d48c963e6f3552919c44c386dcceeb3d2433f463a12c59
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D93 10272 bytes