Malicious PDF — malware analysis report

Static analysis result for SHA-256 839e5b930b18a718…

MALICIOUS

PDF

88.9 KB Created: 2020-09-20 06:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67f9c1011cdd0fb38e2a6dfeec3cbeb3 SHA-1: ac9578352f9fb73ac096d2211975778d51e3b6d5 SHA-256: 839e5b930b18a7184911336c1c084c2ed7c2985148b9cc9773a3532ba613eaa7
160 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating a social engineering attempt. The document body, though heavily obfuscated, contains text related to 'serial number photoshop cs5 startimes' and a URL that matches the redirector link. The 'SE_BROWSER_INSTALL_LURE' heuristic further suggests the document prompts the user to install something, likely to facilitate malware delivery or credential theft.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.link/wix?keyword=serial+number+photoshop+cs5+startimes
    • http://files.melisakaye.com/uploads/1/3/1/3/131379873/nudiz-milawiru.pdf
    • http://rifed.holisticfamilycare.com/uploads/1/3/0/7/130739906/xaleni_gowaf_rigapakukal.pdf
    • http://files.spoonfulpdx.com/uploads/1/3/2/7/132712315/dfaa68483e546.pdf
    • http://xiwozin.dannyflynn.com/uploads/1/3/1/4/131453943/damifugipisi-govobidopepaso-xadubopuwipevon-nuzaluzuzazijit.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/didafiputawomifi.pdf
    • https://cdn.shopify.com/s/files/1/0459/9175/5938/files/celpip_score_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/2874/1272/files/98495060597.pdf
    • https://cdn.shopify.com/s/files/1/0430/9434/3834/files/wigugibuw.pdf
    • https://cdn.shopify.com/s/files/1/0440/5523/2677/files/odisha_map_download_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0434/8621/6352/files/ranuxaju.pdf
    • https://cdn.shopify.com/s/files/1/0432/3321/4621/files/taylorkayteee_workout_guide_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/1523/3948/files/add_template_powerpoint_2013.pdf
    • https://cdn.shopify.com/s/files/1/0480/3146/5631/files/how_to_use_a_handheld_sewing_awl.pdf
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/57334080173.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
stream_006_off00012c7e.bin
66fc3a0966ed02ef8ed7104bf0ab82df4d9d1c5abe2d20fe381e14cff6993d69
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12C7E 24084 bytes
font_00_sfnt_off0000ee71.bin
3647cec67f0a174e57fe2043e544ed5521de6bdbaf72c79f5b80efa8478a2641
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE71 5540 bytes
font_01_sfnt_off00010116.bin
42a935091efe7ed6ebbe8ce83ef0de0ca3ca42ba1c2c2ff6d0c7319a8d8dc8a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x10116 13428 bytes