Malicious PDF — malware analysis report

Static analysis result for SHA-256 311f1452ed761801…

MALICIOUS

PDF

46.9 KB Created: 2020-07-26 12:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a17e8197ebef2ff2d724343b96a7e50 SHA-1: b38d5fcfb290fba8cf68ad475e4d12e5158d7c7a SHA-256: 311f1452ed7618017b9e5c4dca52c2755d3f0448d954f735f9d2b182be51e24a
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'journal penyakit laringitis pdf'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content. The presence of multiple PDF links also suggests a link farm or SEO poisoning tactic.

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/wb?keyword=jurnal%20penyakit%20laringitis%20pdf
    • http://files.partyhousesupplies.com/uploads/1/3/2/8/132814949/15987a208b6c.pdf
    • http://files.quasilocum.com/uploads/1/3/1/3/131380733/dazepip-tefifipipewesex.pdf
    • http://files.clevelandvoiceandsleep.com/uploads/1/3/0/9/130969944/3915040.pdf
    • http://files.summerlandchurchoflight.org/uploads/1/3/1/3/131383842/166ba4bf.pdf
    • http://files.summerlandchurch
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/kodef.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0025/files/mifegetuta.pdf
    • https://cdn.shopify.com/s/files/1/0431/8121/1802/files/daxisoxed.pdf
    • https://cdn.shopify.com/s/files/1/0434/8549/5453/files/22567392088.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/55782763899.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86562581376.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6615/files/runutevasonafadifuranere.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/tafuzegexekifu.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0608/files/48644077218.pdf
    • https://cdn.shopify.com/s/files/1/0437/8954/9726/files/92387838214.pdf
    • https://cdn.shopify.com/s/files/1/0428/4763/3575/files/lasozenekomojikurel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/texirid.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_off000074b4.bin
7817d5392274b98d9d151be31f87b4200fa3fcaa5142371ea4f75d3ca0ddce33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B4 5136 bytes
font_01_sfnt_off0000863b.bin
361dab49ad4d1327a359e6062c5597c3a312dc11d260265056656a7b15a16328		 pdf-font-stream PDF embedded font (sfnt) at offset 0x863B 12540 bytes

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