Malicious PDF — malware analysis report

Static analysis result for SHA-256 381ffc7ed4d9f044…

MALICIOUS

PDF

58.1 KB Created: 2020-09-21 06:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2657826dd7fcd0cf362dcda91c16120e SHA-1: fb39fa42726ce9dcbf96d616d5f8cb60a97917b9 SHA-256: 381ffc7ed4d9f044797b9202446455d1483fcbb744dba7feccb21816053b5dbd
130 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to external PDF files hosted on various domains, indicating a link farm. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.link/wix?keyword=apk+ios+2020'. The document body also contains this URL and other PDF links, suggesting a coordinated effort to direct users to potentially malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

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.link/wix?keyword=apk+ios+2020
    • http://jigofi.manticarchitecture.com/uploads/1/3/0/7/130739227/jenafade.pdf
    • http://kozanibox.thebedrockinitiative.org/uploads/1/3/1/8/131860553/9640705.pdf
    • http://files.kayakanglersofmissouri.com/uploads/1/3/0/8/130814718/1557884.pdf
    • http://files.bellinghaminspector.com/uploads/1/3/1/6/131637953/9570836.pdf
    • http://files.mysweatshops.com/uploads/1/3/1/6/131637814/tuvebipuwutiji.pdf
    • http://lasirifi.ouritalyadventure.net/uploads/1/3/0/7/130739732/gejorusipovomarap.pdf
    • http://fopom.bridgeportcf.org/uploads/1/3/1/8/131871787/1802088.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/xizuku.pdf
    • https://cdn.shopify.com/s/files/1/0433/0147/0366/files/ladizovigofaga.pdf
    • https://cdn.shopify.com/s/files/1/0435/4798/4026/files/acids_and_bases_study_guide_chapter_18.pdf
    • https://511fad45-4fc7-48b9-92e2-0b20dcfaa6d9.filesusr.com/ugd/4ae4db_6bfe61c9364a4055b6f3df690c6a322c.pdf?index=true
    • https://83b6c9f5-b799-4b97-a804-bbd367c7065f.filesusr.com/ugd/7e84b7_ad9735d690f34da887d487c950891ec2.pdf?index=true
    • https://da3f42f4-af1d-4507-b0b0-833a5e6bbf45.filesusr.com/ugd/b13fd1_9ec390ecd1bb4641a2b04b3eba0ba0dd.pdf?index=true
    • https://36f3c732-ab51-487e-9059-850b3582bb3a.filesusr.com/ugd/1d64af_e3feeb05954640a7b44c4f3c1082d2ef.pdf?index=true
    • 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_off0000a73f.bin
9064ed773280e69505ebe8e74b7ce310c20bd6cce27b3f443f7077701c6586e2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA73F 4800 bytes
font_01_sfnt_off0000b7b5.bin
02028e5d5f03cc8fe36ee1cbdfc89316ae28a664da99decc88b08c9e9b16bb81
pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B5 10564 bytes