Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e4fffbff0346d24…

MALICIOUS

PDF

45.4 KB Created: 2020-08-24 23:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 768224397d36d33869be2974af38c36f SHA-1: 034a7d22de6d79dbdaffd1e39b96668970277476 SHA-256: 3e4fffbff0346d241f5df6015d22964597cdf125c1e5f5936908aa602c16a00c
120 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating malicious intent, specifically a redirector link and a link farm. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=eyewitness+report+meaning', which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to the redirector URL and appears to be generated by wkhtmltopdf, suggesting a programmatic approach to creating lure documents. The presence of numerous external PDF links, many hosted on shopify.com, further supports the link farm heuristic.

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.cc/pify?keyword=eyewitness+report+meaning
    • http://files.spiritcreekfarm.com/uploads/1/3/1/3/131384436/9062587.pdf
    • http://files.miisteamhaititeachers.com/uploads/1/3/1/0/131071196/lexanisuzipe_tukol.pdf
    • http://vasonom.akmaritimejobs.com/uploads/1/3/1/8/131871717/5da4f6afde12.pdf
    • https://cdn.shopify.com/s/files/1/0437/0527/0437/files/encyclopedia_of_philosophy_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/5196/5855/files/tipos_de_carcinogenos.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/xenulumobuj.pdf
    • https://cdn.shopify.com/s/files/1/0456/4464/4519/files/oracle_fusion_intercompany_reconciliation_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/3342/0195/files/72048517963.pdf
    • https://cdn.shopify.com/s/files/1/0429/6150/2362/files/52307175564.pdf
    • https://cdn.shopify.com/s/files/1/0436/2246/5699/files/ludelemibejisiviwab.pdf
    • https://cdn.shopify.com/s/files/1/0435/8022/7747/files/36280681284.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/funivigiwurotoguzerixib.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/potomixukagawet.pdf
    • https://cdn.shopify.com/s/files/1/0447/4676/8535/files/catalogo_eudora_ciclo_5.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gijamibumiji.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_off00007379.bin
169c35cc64d6a81c34e1292ee3ff3dd3385ade8417eb6af110d19ce85221b5fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7379 5260 bytes
font_01_sfnt_off00008560.bin
8053e1ae91fbae232b71724224b053215f133f9516ff0d7e28ababbdf7aff1cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8560 10312 bytes

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