Malicious PDF — malware analysis report

Static analysis result for SHA-256 37383f4e88bcb1e4…

MALICIOUS

PDF

44.9 KB Created: 2020-08-16 22:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce3285062a4d80f78ddc3448c518912f SHA-1: c45248f98355faf444409678f6ef3f414c10e7a1 SHA-256: 37383f4e88bcb1e4b4d01a6aaa5e2772d1a96f3421c0c89ce36a0921f4968ebe
128 Risk Score

Malware Insights

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

The PDF file contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for downloading a file, reinforced by the 'SE_DOWNLOAD_BUTTON' heuristic. The primary malicious URL identified is https://ttraff.com/pify?keyword=acknowledgment+sample+for+project+report, which is likely used to redirect the user to a second-stage payload.

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=acknowledgment+sample+for+project+report
    • http://ketonan.ytbimex.com/uploads/1/3/1/4/131407406/fc1bdc4b.pdf
    • http://xuxobi.hydeheathpreschool.org.uk/uploads/1/3/2/8/132814930/jowizumigofev_suzagivogumu_jowupubiwajega_mokubuk.pdf
    • http://files.ebtransforms.com/uploads/1/3/0/7/130775033/xebefunumub-begetariruza-wuwetokozujelod.pdf
    • http://bagokel.kamagongchemtradecorp.com/uploads/1/3/1/6/131636725/jifuloxel-gowanidoti-volodur.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/25134444309.pdf
    • https://cdn.shopify.com/s/files/1/0434/9699/7030/files/fairly_odd_parents_theme_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/1609/3849/files/vagibixiroxulax.pdf
    • https://cdn.shopify.com/s/files/1/0434/2166/3397/files/bipiziluwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7741/0720/files/nudonidobaxutagatuw.pdf
    • https://cdn.shopify.com/s/files/1/0436/4192/9886/files/event_id_4624.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80787326618.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/polabenigaluwokaka.pdf
    • https://cdn.shopify.com/s/files/1/0434/8103/9013/files/36441708849.pdf
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/34649437932.pdf
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/applied_physics.pdf
    • https://cdn.shopify.com/s/files/1/0440/5267/6773/files/mapa_mundi.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_off000062a3.bin
6384e7d6c75371b3c4e5479d464d60824dce2513e2d240f145b5d01ec1e0d0bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x62A3 5436 bytes
font_01_sfnt_off00007521.bin
a4c5c7b66ad3e1f6601cd95c26fb0fdd36019e6345f6f6d3f84ebebc30353028
pdf-font-stream PDF embedded font (sfnt) at offset 0x7521 10524 bytes
font_02_sfnt_off00009845.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9845 4324 bytes