Malicious PDF — malware analysis report

Static analysis result for SHA-256 37d6be80b41b2958…

MALICIOUS

PDF

45.7 KB Created: 2020-08-22 16:41:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9ae79332a2abd945304b8ea770b8b54 SHA-1: a501fe6fa372e6a62007f740ce7cb8549e0481fa SHA-256: 37d6be80b41b29580f60aa60151728f2f97b380a8462617dfc6d1da73623cc39
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body text, though heavily obfuscated, contains the phrase 'birdie crush apk mod' and the malicious URL, suggesting a lure for potentially unwanted software or malware. The presence of a visual download button heuristic further supports the social engineering aspect of this attack. The primary malicious URL is https://ttraff.com/pify?keyword=birdie+crush+apk+mod, which likely serves as the initial entry point for further malicious activity.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=birdie+crush+apk+mod
    • http://xenanujed.bestgatelatch.com/uploads/1/3/0/9/130969723/3cfc23.pdf
    • http://files.wetfutures.eu/uploads/1/3/0/7/130739704/dewubi-fulave.pdf
    • https://cdn.shopify.com/s/files/1/0428/9878/4422/files/nagolejepexuwukenazojewun.pdf
    • https://cdn.shopify.com/s/files/1/0431/1003/9719/files/37882261079.pdf
    • https://cdn.shopify.com/s/files/1/0439/4283/8427/files/76350324053.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gifowugebivagobawogun.pdf
    • https://cdn.shopify.com/s/files/1/0432/4658/3976/files/besowovowobo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3549/2503/files/jumiferidirix.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/obc_caste_certificate_form_assam.pdf
    • https://cdn.shopify.com/s/files/1/0429/2539/2035/files/apa_formatting_references_website.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/lois_griffin_tatum_hentemann.pdf
    • https://cdn.shopify.com/s/files/1/0432/9707/9460/files/40439799679.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/bijosiwuvifutogu.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_off0000618f.bin
2b08d8bc638822722ab6bf0f5ce68fb54e1bc761f9f272bc06ac6ffec9c47c6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x618F 5392 bytes
font_01_sfnt_off000073b9.bin
3e829eb4a90df987c0b800cb2fd02dac667d77d03850d911aab9362518473734
pdf-font-stream PDF embedded font (sfnt) at offset 0x73B9 9728 bytes
font_02_sfnt_off00009537.bin
f303f1ba6be666994474553c41d1e66f9cd2983a7632db4a38a22667ca204af9
pdf-font-stream PDF embedded font (sfnt) at offset 0x9537 16120 bytes