Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fb45f92112fd0fc…

MALICIOUS

PDF

39.3 KB Created: 2020-09-19 19:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2835dfbb4d9ed8d094306ce57b64c7f7 SHA-1: 9abf3c5d17a99161c473a4aae632f05052b77395 SHA-256: 4fb45f92112fd0fc263b5cf3e9f38898d2a3098ee59f95ef618c55a257fedf8a
170 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.club/wix?keyword=kik+apk+no+ads'. Additionally, it features a large number of embedded links, suggesting a link farm, and a visual download button lure. The presence of a 'password-protected archive handoff' heuristic indicates a common tactic to bypass gateway security by instructing the user to decrypt a payload. No scripts were extracted, but the overall pattern suggests a social engineering attempt to trick the user into downloading malware.

Heuristics 5

  • 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
  • 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.club/wix?keyword=kik+apk+no+ads
    • http://files.zuppfitness.com/uploads/1/3/1/6/131636987/845389.pdf
    • http://puwemi.cincinnatideckandfence.com/uploads/1/3/2/3/132302915/4d815b806d.pdf
    • https://8e3450c4-78f6-4c51-a055-e52d21b952f5.filesusr.com/ugd/724bd4_84ec6b3882f145d9be29f9d53cf07197.pdf?index=true
    • https://38a1787c-9326-4990-a90d-20801b7c4e38.filesusr.com/ugd/dbbfd0_58a11b1c494a44aaa7159c1d0e8c46ba.pdf?index=true
    • https://ff95cfb1-003b-40ec-bced-9bcdba55c9f6.filesusr.com/ugd/f3cb45_168d28215c874e10be6a367d12b0438d.pdf?index=true
    • https://dfbd5a5b-bb3c-4d9a-8a35-cf7da2a014f9.filesusr.com/ugd/4fea5c_45fd65e076cc4efcba6bc5ad52d043ba.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/2588/2520/files/batudiwunu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9549/0721/files/tigagiwademu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3400/2086/files/21200906734.pdf
    • https://cdn.shopify.com/s/files/1/0433/1814/9285/files/xipujipawoxadug.pdf
    • https://cdn.shopify.com/s/files/1/0437/4082/3706/files/june_2016_earth_science_regents_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0434/9162/3077/files/tardiness_of_students_in_philippines.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_off00005d3f.bin
7a290336e748b5c3e194f6b20f1b529282293b494928b0322a8bbe5ab1d37b3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3F 4856 bytes
font_01_sfnt_off00006ddd.bin
b85e26b498fe96bc80347994049892dec7263657430611a88490ef45420da15c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDD 10356 bytes