Malicious PDF — malware analysis report

Static analysis result for SHA-256 e725351562303cbb…

MALICIOUS

PDF

47.8 KB Created: 2020-09-07 05:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b949ad600d5c69b298b84a294aee1c2 SHA-1: 6cccf002ee5cb0edc1126a153eee8e7150c58eac SHA-256: e725351562303cbbf2b915882465d4e259bd90732b2eef942c1b18df271eff89
120 Risk Score

Malware Insights

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

The PDF file contains a prominent link that appears to offer interview questions and answers. This link, however, redirects to a known malicious domain (ttraff.club). The document also contains a large number of links to other PDFs hosted on static.usrfiles.com, suggesting a link farm or SEO poisoning tactic to distribute the malicious URL. The primary intent is to lure the user into clicking the malicious link by disguising it as relevant content.

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.club/wix?keyword=sales+marketing+executive+interview+questions+and+answers
    • https://static.usrfiles.com/ugd/b8c837_0ef0b7b5cfa94282a8fa342ea28f6974.pdf
    • https://static.usrfiles.com/ugd/5ea4d5_972f84c38e2642a397486d998d11d02c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8813a76683e41758b0793fc6c1a0021.pdf
    • https://cdn.shopify.com/s/files/1/0434/0704/8860/files/tideponikedumanoro.pdf
    • https://cdn.shopify.com/s/files/1/0438/0845/6861/files/jawixerivipolaxusaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/9372/8159/files/rati_rati_ratnakar_assamese_song.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/febudiwovasimixeminuseb.pdf
    • https://cdn.shopify.com/s/files/1/0437/7850/6909/files/zujovila.pdf
    • https://cdn.shopify.com/s/files/1/0463/2326/9792/files/15320494893.pdf
    • https://cdn.shopify.com/s/files/1/0428/6165/8279/files/fejenozebevogibe.pdf
    • https://static.usrfiles.com/ugd/4117a9_ce390f89d49c46b786ca8320435011ef.pdf
    • https://static.usrfiles.com/ugd/2c7c49_4197e977fa24422daa39684b98107618.pdf
    • https://static.usrfiles.com/ugd/4725f1_627a726b416946fb8ed2faafa6a40103.pdf
    • https://static.usrfiles.com/ugd/54fa57_53ed0bb4d96c4d53ac7d35ea9c0cf20f.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
font_00_sfnt_off00006e4a.bin
20e1d88e8afa04c87fd7e2d4c91d790f8af2dea65d7d8023202701848467def6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4A 5656 bytes
font_01_sfnt_off00008168.bin
23acacab2307bcd34df7a5a75b874441df5158a7ca905af34a303e0318f01690		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8168 10132 bytes
font_02_sfnt_off0000a3f9.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3F9 4324 bytes

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