Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb5fdbce80820c9…

MALICIOUS

PDF

50.7 KB Created: 2020-08-20 10:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfdbcb1b2ff684409a8f580655bad3a1 SHA-1: 54cb1ce4b232b41c1af1231586acb55d73075a7c SHA-256: 9cb5fdbce80820c9497f9edd10a6117756b027064c1fc57a70a5008bd04fa0b5
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to a URL that promises cracked software. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL and references to software cracking, reinforcing the lure. The presence of a 'Password-protected archive handoff' heuristic suggests a multi-stage attack where the user is prompted to obtain a password for a subsequent download.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.ru/pify?keyword=crack+ableton+live+9+trial
    • http://files.pastandpresentmedia.org/uploads/1/3/2/6/132695919/4431023.pdf
    • http://files.nourishandthriveforlife.com/uploads/1/3/1/8/131857565/peradibetevofe-tuvedixeki-godoparuzubabun-samuvatuvejag.pdf
    • https://cdn.shopify.com/s/files/1/0436/9534/1723/files/2185765148.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/2292325658.pdf
    • https://cdn.shopify.com/s/files/1/0436/6126/3001/files/english_grammar_exercise_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/4th_of_july_pass_snow_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9120/files/xarokurufabo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/gowedivutezojanu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/81994140437.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/34795368841.pdf
    • https://cdn.shopify.com/s/files/1/0435/3730/1653/files/66320711818.pdf
    • https://cdn.shopify.com/s/files/1/0432/8695/4140/files/belevulumagejasesovigo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/pelicula_escritores_de_la_libertad.pdf
    • https://cdn.shopify.com/s/files/1/0437/1457/6538/files/lexus_sc300_manual_for_sale.pdf
    • https://cdn.shopify.com/s/files/1/0434/4872/9766/files/wupulakarijulosera.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7424/files/lovubonunuxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1962/4870/files/tixenolugip.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_off0000715c.bin
26dd5a27f4d02ad51a87da89e33d1beb0a81a83c979ef1a81feae4d21a3c6bbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x715C 4848 bytes
font_01_sfnt_off000081e4.bin
83f0081698445aa1ef3d46e1232ef0debaa47791d4b723e7f34ba1d52aca11c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81E4 14908 bytes
font_02_sfnt_off0000afd1.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD1 4324 bytes

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