Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7c5d8958e4baa78…

MALICIOUS

PDF

63.3 KB Created: 2020-08-12 01:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee5183e30fbedc01bfce0e4599c02ad4 SHA-1: c9220df8956ec31e1e8c0a6cad58136f79ae9fda SHA-256: c7c5d8958e4baa7813d00b4af69d21a430dbc3000ac5d01ff2a1ab6674cd4270
162 Risk Score

Malware Insights

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

The PDF file contains a link farm and a redirector to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The document body, though heavily obfuscated, contains a URL that appears to be part of a lure for an advance-fee scam, as indicated by the SE_ADVANCE_FEE_SCAM_LURE heuristic. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/wb?keyword=linksys%20router%20e2500%20manual
    • http://bejoro.shadowpara.com/uploads/1/3/1/6/131606069/gomabajewasube-leroliwinu-zaxes.pdf
    • http://files.humanrightskcsj.org/uploads/1/3/1/3/131398008/fibemavadomevuf_gowubezif.pdf
    • http://files.patriksoderstam.com/uploads/1/3/1/4/131453733/kazeleje.pdf
    • http://files.spscstrength.com/uploads/1/3/2/7/132740378/51e6f5fec59.pdf
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/ropaxuvetufewinumumadim.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1657/files/34416037089.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/pronoun_antecedent_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8239/files/boledazol.pdf
    • https://cdn.shopify.com/s/files/1/0427/8448/9631/files/90591916980.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/pixapinakikomifib.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/fukiwifetesiwesuxupaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7005/4805/files/90360592524.pdf
    • https://cdn.shopify.com/s/files/1/0433/8355/4202/files/current_affairs_awards_2020_download.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_off0000ba2f.bin
d2d2386ea3e1c8ae6139c79f21369443f98df1225c7adec552fdb3c8156f81be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA2F 5336 bytes
font_01_sfnt_off0000cc4d.bin
c83e4b343ed20ef5b149d7260fa414b2edb35a81807f849ae0749ddb2755d04e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4D 10680 bytes

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