Malicious PDF — malware analysis report

Static analysis result for SHA-256 57e7cdda75a85ef7…

MALICIOUS

PDF

41.9 KB Created: 2020-08-29 01:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c4946780e98bbbe999628fc95e76528 SHA-1: af0121ebbd00829ccdfdf535cb2c849758238ca7 SHA-256: 57e7cdda75a85ef73ec020c1d0f565937ffae125a94c81ed67a47f8314a774c8
128 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external links, with a critical heuristic identifying a malicious redirector link. The primary malicious URL is https://ttraff.cc/wix?keyword=fabriquer+une+regle+vibrante. The document body, though heavily obfuscated, contains this URL, suggesting it's the intended destination. The presence of numerous external links, many pointing to benign Shopify URLs, indicates a link farm strategy to obscure the malicious redirector.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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/wix?keyword=fabriquer+une+regle+vibrante
    • https://static.usrfiles.com/ugd/b8c837_829c01bb2fed4a9197fbc282b2221f49.pdf
    • https://static.usrfiles.com/ugd/b8c837_edfa53a2e3a74d12ae222b402f5bbddc.pdf
    • https://static.usrfiles.com/ugd/b8c837_8657dfc8d9494d70855fa76bb9c1a0e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_aca79ec28290424c9177383f61468290.pdf
    • https://static.usrfiles.com/ugd/b8c837_b19415cbbbb84587b00bd428bcd33622.pdf
    • https://cdn.shopify.com/s/files/1/0433/6333/6350/files/format_of_absence_application_for_school.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6661/files/mokugodupejata.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/how_to_lock_scrolling_in_excel_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/natarujelozulikozem.pdf
    • https://cdn.shopify.com/s/files/1/0436/3563/8425/files/go_go_bts_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9401/files/ecological_footprint.pdf
    • https://cdn.shopify.com/s/files/1/0429/2060/7900/files/critical_path_method_solved_problems.pdf
    • https://cdn.shopify.com/s/files/1/0437/6343/3629/files/catia_v5_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6726/9532/files/fivabosetasixixelemewag.pdf
    • https://cdn.shopify.com/s/files/1/0439/2691/3179/files/behavioral_specialist_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/4366/7616/files/7174898952.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_off000062d5.bin
4c6c30a769a0321e44b3dcafae98b40da4d71d97458b063db90aede245ef7316
pdf-font-stream PDF embedded font (sfnt) at offset 0x62D5 4956 bytes
font_01_sfnt_off000073cb.bin
873fca95cf053848957cc47da650f0a3767e11bef24d4e4a054d61da9a2113f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x73CB 11832 bytes